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","image":["/images/twentyfourfit.shop/images/product/xf10-j-hooks-safety-spotter-arms-set-1.webp","/images/twentyfourfit.shop/images/product/xf10-j-hooks-safety-spotter-arms-set-2.webp"],"sku":"xf10-j-hooks-safety-spotter-arms-set","brand":{"@type":"Brand","name":"24/7 Gym Equipment"},"offers":{"@type":"AggregateOffer","lowPrice":82.16,"highPrice":82.16,"priceCurrency":"USD","availability":"https://schema.org/InStock","url":"https://twentyfourfit.shop/products/xf10-j-hooks-safety-spotter-arms-set","offerCount":1}}\n In Stock โ Sydney Warehouse\n๐ง XF10 (XC10) Compatible\n๐ 50ร70 Uprights | 20mm Pins\n๐ก๏ธ 4-Piece Safety Set\n๐๏ธ J-Hooks + Spotter Arms\n๐ Australia-Wide Delivery\n
\n\nPremium J-Hooks & Safety Spotter Arms โ 4-Piece Barbell Safety Set For XF10 (XC10) Functional Trainer Smith Machine All-in-One | Solo Training Safety | Australia\n
\n\n\n
\n\nThe Premium J-Hook & Safety Spotter Arm Set is a complete 4-piece barbell safety system for the XF10 (XC10) Functional Trainer Smith Machine All-in-One. The set includes one pair of heavy-duty J-hooks for barbell racking and unracking, and one pair of safety spotter arms with a protective catch surface to stop the bar if you fail a rep. Both pieces pin directly into the XF10 and G6S upright system (50mm x 70mm uprights) at any height position โ no tools, no modification. Built from commercial-grade steel with a matte black powder-coat finish matched to the XF10 frame, this set is the essential safety foundation for solo barbell training on squats, bench press, overhead press and rack pulls.
\n\n\n
\n\n\nTrain heavy. Train alone. Train safely. J-hooks and spotter arms are not optional safety extras โ they are the system that makes solo barbell training to failure possible. Set your J-hooks at the correct unrack height and your spotter arms one hole below your lowest safe range. The bar lands on the arms if you can't complete the rep โ not on you.
\n\n\n
\n\n\nCompatible Machine This 4-piece set is designed specifically for the XF10 (XC10) Functional Trainer Smith Machine All-in-One. Both J-hooks and spotter arms pin directly into the XF10 numbered upright hole system (50mm x 70mm uprights) at any height position โ no drilling or modification required. Contact us before ordering if you are unsure which machine you own.\n
\n\n
\n\n4PCS Complete Set\n
\n\n2 J-Hooks Included\n
\n\n2 Spotter Arms Included\n
\n\nMULTI Height Positions\n
\nWhat's in the Set
\n2 J-Hooks + 2 Spotter Arms โ What Each Does
\n\n
\n\n
\n\n\n
\n\n
\nJ-Hooks
\n1 Pair โ 2 Pieces
\n\n
\nJ-hooks are the barbell catch brackets that hold the bar at your starting (unrack) position. You load the bar, set the J-hooks at the right height, unrack the bar to begin your set, and re-rack it when finished. The hook profile catches the bar collar securely between sets.
\n- \n
- Sets the barbell starting height for each exercise \n
- Holds the bar securely between sets and during loading \n
- Pin-adjustable to any upright position on the XF10 \n
- Protective inner liner prevents bar knurling damage \n
- Used for squats, bench press, overhead press & rack pulls \n
\n
\n\n\n
\n\n
\nSafety Spotter Arms
\n1 Pair โ 2 Pieces
\n\n
\nSpotter arms are horizontal catch bars set just below your lowest working range. If you fail a rep, you lower the bar onto the spotter arms rather than being trapped under it. They are the safety net that makes training to failure without a spotter possible.
\n- \n
- Catches the bar at the bottom of a failed rep \n
- Set one hole below your lowest safe range of motion \n
- Raised safety lip prevents bar rolling off during a catch \n
- Bolt-lock collar eliminates lateral movement under load \n
- Multi-hole adjustment โ precise height setting for each exercise \n
\nWhy buy this set rather than J-hooks or spotter arms separately?
J-hooks and spotter arms are always used together โ one positions the bar, the other catches it. Purchasing the 4-piece set ensures the finish, fit and pin dimensions are matched to the XF10 frame as a system. It also means you have both components ready to configure for any exercise from day one โ no sourcing parts individually or discovering a mismatch after purchase.
\nJ-hooks and spotter arms are always used together โ one positions the bar, the other catches it. Purchasing the 4-piece set ensures the finish, fit and pin dimensions are matched to the XF10 frame as a system. It also means you have both components ready to configure for any exercise from day one โ no sourcing parts individually or discovering a mismatch after purchase.
How to Set Up for Safe Solo Training
\n4 Steps to Heavy Solo Barbell Work
\n\n
\n\n
\n1
\n\nSet the J-Hooks at Your Unrack Height Pin the J-hooks at the height where you can comfortably unrack and re-rack the barbell with a slight knee bend. The bar should be reachable without having to stretch or stand on toes โ typically just below shoulder height for squats, or at arm extension for bench press.\n
\n\n
\n2
\n\nSet the Spotter Arms One Hole Below Your Bottom Range Unrack the bar without weight and perform the movement to your deepest safe position. Set the spotter arms one upright hole below that point. The bar should clear the arms throughout your full working range but make contact if you fail and need to set the bar down.\n
\n\n
\n3
\n\nLock the Bolt Collars on the Spotter Arms Tighten the bolt-lock collars on both spotter arms firmly. Check both arms are at the same height position and level before loading the bar. An uneven pair of spotter arms can cause the bar to tip sideways during a catch โ always verify both sides match.\n
\n\n
\n4
\n\nDry Run โ Then Load and Train Unrack the bar with no weight and run through the full movement range. Confirm the bar clears the spotter arms throughout and contacts them cleanly at the bottom if you were to fail. Once confirmed, load up and train with confidence.\n
\nKey Features
\nPremium Build โ Every Detail Counts
\n\n
\n\n\n
\n\nCommercial-Grade Heavy-Duty Steel Both J-hooks and spotter arms are built from heavy-duty steel rated for the sudden shock load of a failed barbell rep at maximum working weight โ not lightweight home gym hardware\n
\n\n\n
\n\nProtective Inner Liner โ J-Hooks The J-hook catch surface is lined with a protective material that cushions the bar during re-racking and prevents knurling damage to both the barbell and the hook surface under repeated loading cycles\n
\n\n\n
\n\nRaised Safety Lip โ Spotter Arms Each spotter arm features a raised front lip that prevents the barbell rolling or sliding forward off the catch surface during a failed rep โ critical on bench press where the bar can shift forward under eccentric load\n
\n\n\n
\n\nBolt-Lock Collar โ Spotter Arms The upright connection on each spotter arm uses a bolt-lock collar that clamps the arm firmly to the frame with zero lateral play โ the arm stays exactly where set, even under sudden eccentric bar catch loads\n
\n\n\n
\n\nMulti-Position Height Adjustment Both J-hooks and spotter arms pin into the XF10 numbered upright hole system at any height โ configure precisely for each exercise and each user's range of motion rather than a rough approximation\n
\n\n\n
\n\nMatched Matte Black Finish Powder-coated matte black finish matched to the XF10 (XC10) machine frame โ the set looks like an integrated part of the machine rather than an aftermarket add-on\n
\nWhat You Can Train Solo With This Set
\nExercises Made Safe by J-Hooks + Spotter Arms
\n\n
\n\n
\nUpper Body
\n- \n
- Barbell bench press โ flat \n
- Barbell bench press โ incline \n
- Barbell overhead press (seated or standing) \n
- Close-grip bench press (tricep focus) \n
- Pin press (partial range overload) \n
- Barbell floor press (low catch position) \n
\n
\nLower Body & Full Body
\n- \n
- Barbell back squat \n
- Barbell front squat \n
- Barbell pause squat \n
- Rack pull (partial deadlift from pins) \n
- Barbell good morning \n
- Barbell hip thrust (low arm position) \n
Specifications
\nTechnical Details
\n| Set Contents | \n2ร J-hooks (1 pair) + 2ร safety spotter arms (1 pair) โ 4 pieces total | \n
| Compatible Machine | \nXF10 (XC10) Functional Trainer Smith Machine All-in-One | \n
| Mount Type | \nPin-in upright holes โ both J-hooks and spotter arms | \n
| Compatible Upright Size | \n50mm x 70mm rectangular uprights | \n
| Hole Size (Pin Diameter) | \n20mm | \n
| Spotter Arm Lock | \nBolt-lock collar โ zero lateral movement under load | \n
| Spotter Arm Safety Feature | \nRaised front lip โ prevents bar roll-off during catch | \n
| J-Hook Inner Surface | \nProtective liner โ cushions bar and prevents knurling damage | \n
| Height Adjustment | \nMulti-position โ any upright pin hole on XF10 uprights | \n
| Construction | \nCommercial-grade heavy-duty steel | \n
| Finish | \nMatte black powder coat โ matched to XF10 (XC10) frame | \n
| Sold As | \nComplete 4-piece set โ J-hooks and spotter arms together | \n
| Delivery | \nAustralia-wide โ Sydney, Melbourne, Brisbane, Adelaide, Perth & regional | \n
Who Is This For?
\nThe Right Set For
\n- \n
- \nSolo trainers lifting heavy on the XF10 โ J-hooks and spotter arms are the safety system that makes training to failure on squats, bench and press possible without a training partner present \n
- \nXF10 owners upgrading or replacing hardware โ if your current J-hooks or spotter arms are worn, damaged or you want a matched premium set, this is the correct compatible replacement for the XF10 (XC10) \n
- \nPT studios and commercial facilities running the XF10 โ clients train unsupervised between sessions; this complete set provides the catch system that makes the rack side of the XF10 genuinely safe for independent use \n
- \nStrength and powerlifting athletes โ training to failure on compound movements requires a reliable safety catch system; the bolt-lock collar and raised spotter lip on this set are built for the forces involved in a real failed rep under maximum load \n
- \nHome gym owners who train without a spotter โ the most common reason home gym users avoid heavy pressing and squatting is the absence of a catch system. This set eliminates that limitation. \n
Frequently Asked Questions
\nCommon Questions
\n\n
\n\n \n
\nThe set includes 4 pieces total: 1 pair of J-hooks (2 pieces) and 1 pair of safety spotter arms (2 pieces). All four pieces are compatible with the XF10 (XC10) Functional Trainer Smith Machine All-in-One and pin into the machine uprights at any height position.
\n\n \n
\n\nJ-hooks hold the barbell at your starting (unrack) position โ you lift the bar off the J-hooks to begin a set and re-rack it when finished. Spotter arms are set below your working range as a safety catch โ if you fail a rep and cannot complete the lift, you lower the bar onto the spotter arms. Both are essential for safe solo barbell training. J-hooks without spotter arms means you have no catch if you fail a rep. Spotter arms without J-hooks means you have no way to rack and unrack the bar correctly.
\n\n \n
\nNo โ J-hooks and spotter arms are set at different heights. J-hooks are set at the height where you comfortably unrack and re-rack the bar. Spotter arms are set below the J-hooks โ one hole below your lowest working range of motion. The gap between J-hook height and spotter arm height is your full working range. Always do a dry run with no weight to confirm the setup before loading the bar.
\n\n \n
\nThe XF10 (XC10) Smith machine has its own integrated safety lock hooks on the bar itself that engage at any point in the movement by rotating the bar โ these provide the catch function for guided Smith machine exercises independently. The J-hooks and spotter arms in this set are for free barbell training through the rack system โ squats, bench press and overhead press using a standard Olympic barbell on the J-hooks. You do not need spotter arms when using the Smith machine side.
\n\n \n
\nThe correct height differs by exercise. For bench press: lie on your bench under the bar and lower it to your chest โ the spotter arms should be set so the bar just clears them at your chest and contacts them if you set it down. Typically 1โ2 holes below J-hook height. For squats: the spotter arms need to be low enough to allow you to reach your full squat depth โ usually around parallel or just above. The arms should catch the bar when you sink below your sticking point and cannot stand back up. Always verify with a dry run using an empty bar before adding weight.
\n\n \n
\nThe J-hooks are sized for standard Olympic barbells with a 50mm sleeve diameter โ which covers the vast majority of Olympic bars used for squats, bench press and overhead press. If you are using a specialty bar with a different sleeve profile, contact us to confirm fitment before ordering. The hook depth and liner are designed to hold the bar securely without the bar rocking or shifting between reps.
\n\n \n
\nBoth J-hooks and spotter arms are built from commercial-grade heavy-duty steel rated for the working loads used on the XF10 machine under typical strength training conditions. The spotter arms are specifically designed to absorb the sudden impact load of a failed barbell rep โ which is a significantly higher force than a controlled re-rack. If you are planning extreme loading (400kg+) for powerlifting competition training, contact us to discuss suitability. For all standard gym and commercial training use cases, this set is rated for the task.
\n\n \n
\nA bench is required for barbell bench press โ the J-hooks and spotter arms position the bar but you need a flat or adjustable bench to lie on underneath. For squats, overhead press and rack pulls no bench is needed โ you stand inside the rack formed by the XF10 uprights and work directly from the J-hooks. An adjustable bench is one of the most common additions purchased alongside this set for XF10 owners who want to perform the full range of barbell pressing exercises.
\n\n \n
\nWhen you reach failure on a squat with spotter arms set correctly, continue to lower the bar in a controlled descent until it contacts the spotter arms โ do not drop it suddenly. The arms absorb the load and you step or duck out from under the bar. If you lose control suddenly, the arms will catch the bar regardless, but a controlled descent onto the arms causes less shock to the machine frame and reduces noise. Never attempt to dump the bar forward or backward โ lower it straight down onto the arms. This is why the dry run with an empty bar is important: it confirms the arms are at the right height to catch the bar before your sticking point.
\nComplete Your Setup
\nFrequently Bought Together
\n\n๐๏ธ XF10 (XC10) All-in-One Gym Station โ โซ Olympic Weight Plates โ ๐๏ธ Olympic Barbell โ ๐ซ Rubber Gym Flooring โ\n
\n\nJ-Hook & Spotter Arm Set Delivery Areas โ Australia:
Sydney (NSW) ยท Parramatta ยท Bankstown ยท Liverpool ยท Penrith ยท Blacktown ยท Campbelltown ยท Bondi ยท Chatswood ยท Castle Hill ยท Northern Beaches ยท Manly ยท North Sydney ยท Mosman ยท Inner West ยท Sutherland Shire ยท Lower North Shore ยท Eastern Suburbs ยท Ryde ยท Melbourne (VIC) ยท Richmond ยท Brunswick ยท Essendon ยท Frankston ยท Dandenong ยท Geelong ยท Ballarat ยท Brisbane (QLD) ยท Fortitude Valley ยท Gold Coast ยท Sunshine Coast ยท Toowoomba ยท Rockhampton ยท Cairns ยท Adelaide (SA) ยท Glenelg ยท Norwood ยท Perth (WA) ยท Canberra (ACT) ยท Wollongong (NSW) ยท Newcastle (NSW) ยท Hobart (TAS) ยท Darwin (NT)
\nSydney (NSW) ยท Parramatta ยท Bankstown ยท Liverpool ยท Penrith ยท Blacktown ยท Campbelltown ยท Bondi ยท Chatswood ยท Castle Hill ยท Northern Beaches ยท Manly ยท North Sydney ยท Mosman ยท Inner West ยท Sutherland Shire ยท Lower North Shore ยท Eastern Suburbs ยท Ryde ยท Melbourne (VIC) ยท Richmond ยท Brunswick ยท Essendon ยท Frankston ยท Dandenong ยท Geelong ยท Ballarat ยท Brisbane (QLD) ยท Fortitude Valley ยท Gold Coast ยท Sunshine Coast ยท Toowoomba ยท Rockhampton ยท Cairns ยท Adelaide (SA) ยท Glenelg ยท Norwood ยท Perth (WA) ยท Canberra (ACT) ยท Wollongong (NSW) ยท Newcastle (NSW) ยท Hobart (TAS) ยท Darwin (NT)
Premium J-Hooks & Safety Spotter Arms, 4-Piece Barbell Safety Set
In Stock โ Sydney Warehouse
๐ง XF10 (XC10) Compatible
๐ 50ร70 Uprights | 20mm Pins
๐ก๏ธ 4-Piece Safety Set
๐๏ธ J-Hooks + Spotter Arms
๐ Australia-Wide Delivery
Premium J-Hooks & Safety Spotter Arms โ 4-Piece Barbell Safety Set For XF10 (XC10) Functional Trainer Smith Machine All-in-One | Solo Training Safety | Australia
The Premium J-Hook & Safety Spotter Arm Set is a complete 4-piece barbell safety system for the XF10 (XC10) Functional Trainer Smith Machine All-in-One. The set includes one pair of heavy-duty J-hooks for barbell racking and unracking, and one pair of safety spotter arms with a protective catch surface to stop the bar if you fail a rep. Both pieces pin directly into the XF10 and G6S upright system (50mm x 70mm uprights) at any height position โ no tools, no modification. Built from commercial-grade steel with a matte black powder-coat finish matched to the XF10 frame, this set is the essential safety foundation for solo barbell training on squats, bench press, overhead press and rack pulls.
Train heavy. Train alone. Train safely. J-hooks and spotter arms are not optional safety extras โ they are the system that makes solo barbell training to failure possible. Set your J-hooks at the correct unrack height and your spotter arms one hole below your lowest safe range. The bar lands on the arms if you can't complete the rep โ not on you.
Compatible Machine This 4-piece set is designed specifically for the XF10 (XC10) Functional Trainer Smith Machine All-in-One. Both J-hooks and spotter arms pin directly into the XF10 numbered upright hole system (50mm x 70mm uprights) at any height position โ no drilling or modification required. Contact us before ordering if you are unsure which machine you own.
4PCS Complete Set
2 J-Hooks Included
2 Spotter Arms Included
MULTI Height Positions
What's in the Set
2 J-Hooks + 2 Spotter Arms โ What Each Does
J-Hooks
1 Pair โ 2 Pieces
J-hooks are the barbell catch brackets that hold the bar at your starting (unrack) position. You load the bar, set the J-hooks at the right height, unrack the bar to begin your set, and re-rack it when finished. The hook profile catches the bar collar securely between sets.
- Sets the barbell starting height for each exercise
- Holds the bar securely between sets and during loading
- Pin-adjustable to any upright position on the XF10
- Protective inner liner prevents bar knurling damage
- Used for squats, bench press, overhead press & rack pulls
Safety Spotter Arms
1 Pair โ 2 Pieces
Spotter arms are horizontal catch bars set just below your lowest working range. If you fail a rep, you lower the bar onto the spotter arms rather than being trapped under it. They are the safety net that makes training to failure without a spotter possible.
- Catches the bar at the bottom of a failed rep
- Set one hole below your lowest safe range of motion
- Raised safety lip prevents bar rolling off during a catch
- Bolt-lock collar eliminates lateral movement under load
- Multi-hole adjustment โ precise height setting for each exercise
Why buy this set rather than J-hooks or spotter arms separately?
J-hooks and spotter arms are always used together โ one positions the bar, the other catches it. Purchasing the 4-piece set ensures the finish, fit and pin dimensions are matched to the XF10 frame as a system. It also means you have both components ready to configure for any exercise from day one โ no sourcing parts individually or discovering a mismatch after purchase.
J-hooks and spotter arms are always used together โ one positions the bar, the other catches it. Purchasing the 4-piece set ensures the finish, fit and pin dimensions are matched to the XF10 frame as a system. It also means you have both components ready to configure for any exercise from day one โ no sourcing parts individually or discovering a mismatch after purchase.
How to Set Up for Safe Solo Training
4 Steps to Heavy Solo Barbell Work
1
Set the J-Hooks at Your Unrack Height Pin the J-hooks at the height where you can comfortably unrack and re-rack the barbell with a slight knee bend. The bar should be reachable without having to stretch or stand on toes โ typically just below shoulder height for squats, or at arm extension for bench press.
2
Set the Spotter Arms One Hole Below Your Bottom Range Unrack the bar without weight and perform the movement to your deepest safe position. Set the spotter arms one upright hole below that point. The bar should clear the arms throughout your full working range but make contact if you fail and need to set the bar down.
3
Lock the Bolt Collars on the Spotter Arms Tighten the bolt-lock collars on both spotter arms firmly. Check both arms are at the same height position and level before loading the bar. An uneven pair of spotter arms can cause the bar to tip sideways during a catch โ always verify both sides match.
4
Dry Run โ Then Load and Train Unrack the bar with no weight and run through the full movement range. Confirm the bar clears the spotter arms throughout and contacts them cleanly at the bottom if you were to fail. Once confirmed, load up and train with confidence.
Key Features
Premium Build โ Every Detail Counts
Commercial-Grade Heavy-Duty Steel Both J-hooks and spotter arms are built from heavy-duty steel rated for the sudden shock load of a failed barbell rep at maximum working weight โ not lightweight home gym hardware
Protective Inner Liner โ J-Hooks The J-hook catch surface is lined with a protective material that cushions the bar during re-racking and prevents knurling damage to both the barbell and the hook surface under repeated loading cycles
Raised Safety Lip โ Spotter Arms Each spotter arm features a raised front lip that prevents the barbell rolling or sliding forward off the catch surface during a failed rep โ critical on bench press where the bar can shift forward under eccentric load
Bolt-Lock Collar โ Spotter Arms The upright connection on each spotter arm uses a bolt-lock collar that clamps the arm firmly to the frame with zero lateral play โ the arm stays exactly where set, even under sudden eccentric bar catch loads
Multi-Position Height Adjustment Both J-hooks and spotter arms pin into the XF10 numbered upright hole system at any height โ configure precisely for each exercise and each user's range of motion rather than a rough approximation
Matched Matte Black Finish Powder-coated matte black finish matched to the XF10 (XC10) machine frame โ the set looks like an integrated part of the machine rather than an aftermarket add-on
What You Can Train Solo With This Set
Exercises Made Safe by J-Hooks + Spotter Arms
Upper Body
- Barbell bench press โ flat
- Barbell bench press โ incline
- Barbell overhead press (seated or standing)
- Close-grip bench press (tricep focus)
- Pin press (partial range overload)
- Barbell floor press (low catch position)
Lower Body & Full Body
- Barbell back squat
- Barbell front squat
- Barbell pause squat
- Rack pull (partial deadlift from pins)
- Barbell good morning
- Barbell hip thrust (low arm position)
Specifications
Technical Details
| Set Contents | 2ร J-hooks (1 pair) + 2ร safety spotter arms (1 pair) โ 4 pieces total |
| Compatible Machine | XF10 (XC10) Functional Trainer Smith Machine All-in-One |
| Mount Type | Pin-in upright holes โ both J-hooks and spotter arms |
| Compatible Upright Size | 50mm x 70mm rectangular uprights |
| Hole Size (Pin Diameter) | 20mm |
| Spotter Arm Lock | Bolt-lock collar โ zero lateral movement under load |
| Spotter Arm Safety Feature | Raised front lip โ prevents bar roll-off during catch |
| J-Hook Inner Surface | Protective liner โ cushions bar and prevents knurling damage |
| Height Adjustment | Multi-position โ any upright pin hole on XF10 uprights |
| Construction | Commercial-grade heavy-duty steel |
| Finish | Matte black powder coat โ matched to XF10 (XC10) frame |
| Sold As | Complete 4-piece set โ J-hooks and spotter arms together |
| Delivery | Australia-wide โ Sydney, Melbourne, Brisbane, Adelaide, Perth & regional |
Who Is This For?
The Right Set For
- Solo trainers lifting heavy on the XF10 โ J-hooks and spotter arms are the safety system that makes training to failure on squats, bench and press possible without a training partner present
- XF10 owners upgrading or replacing hardware โ if your current J-hooks or spotter arms are worn, damaged or you want a matched premium set, this is the correct compatible replacement for the XF10 (XC10)
- PT studios and commercial facilities running the XF10 โ clients train unsupervised between sessions; this complete set provides the catch system that makes the rack side of the XF10 genuinely safe for independent use
- Strength and powerlifting athletes โ training to failure on compound movements requires a reliable safety catch system; the bolt-lock collar and raised spotter lip on this set are built for the forces involved in a real failed rep under maximum load
- Home gym owners who train without a spotter โ the most common reason home gym users avoid heavy pressing and squatting is the absence of a catch system. This set eliminates that limitation.
Frequently Asked Questions
Common Questions
The set includes 4 pieces total: 1 pair of J-hooks (2 pieces) and 1 pair of safety spotter arms (2 pieces). All four pieces are compatible with the XF10 (XC10) Functional Trainer Smith Machine All-in-One and pin into the machine uprights at any height position.
J-hooks hold the barbell at your starting (unrack) position โ you lift the bar off the J-hooks to begin a set and re-rack it when finished. Spotter arms are set below your working range as a safety catch โ if you fail a rep and cannot complete the lift, you lower the bar onto the spotter arms. Both are essential for safe solo barbell training. J-hooks without spotter arms means you have no catch if you fail a rep. Spotter arms without J-hooks means you have no way to rack and unrack the bar correctly.
No โ J-hooks and spotter arms are set at different heights. J-hooks are set at the height where you comfortably unrack and re-rack the bar. Spotter arms are set below the J-hooks โ one hole below your lowest working range of motion. The gap between J-hook height and spotter arm height is your full working range. Always do a dry run with no weight to confirm the setup before loading the bar.
The XF10 (XC10) Smith machine has its own integrated safety lock hooks on the bar itself that engage at any point in the movement by rotating the bar โ these provide the catch function for guided Smith machine exercises independently. The J-hooks and spotter arms in this set are for free barbell training through the rack system โ squats, bench press and overhead press using a standard Olympic barbell on the J-hooks. You do not need spotter arms when using the Smith machine side.
The correct height differs by exercise. For bench press: lie on your bench under the bar and lower it to your chest โ the spotter arms should be set so the bar just clears them at your chest and contacts them if you set it down. Typically 1โ2 holes below J-hook height. For squats: the spotter arms need to be low enough to allow you to reach your full squat depth โ usually around parallel or just above. The arms should catch the bar when you sink below your sticking point and cannot stand back up. Always verify with a dry run using an empty bar before adding weight.
The J-hooks are sized for standard Olympic barbells with a 50mm sleeve diameter โ which covers the vast majority of Olympic bars used for squats, bench press and overhead press. If you are using a specialty bar with a different sleeve profile, contact us to confirm fitment before ordering. The hook depth and liner are designed to hold the bar securely without the bar rocking or shifting between reps.
Both J-hooks and spotter arms are built from commercial-grade heavy-duty steel rated for the working loads used on the XF10 machine under typical strength training conditions. The spotter arms are specifically designed to absorb the sudden impact load of a failed barbell rep โ which is a significantly higher force than a controlled re-rack. If you are planning extreme loading (400kg+) for powerlifting competition training, contact us to discuss suitability. For all standard gym and commercial training use cases, this set is rated for the task.
A bench is required for barbell bench press โ the J-hooks and spotter arms position the bar but you need a flat or adjustable bench to lie on underneath. For squats, overhead press and rack pulls no bench is needed โ you stand inside the rack formed by the XF10 uprights and work directly from the J-hooks. An adjustable bench is one of the most common additions purchased alongside this set for XF10 owners who want to perform the full range of barbell pressing exercises.
When you reach failure on a squat with spotter arms set correctly, continue to lower the bar in a controlled descent until it contacts the spotter arms โ do not drop it suddenly. The arms absorb the load and you step or duck out from under the bar. If you lose control suddenly, the arms will catch the bar regardless, but a controlled descent onto the arms causes less shock to the machine frame and reduces noise. Never attempt to dump the bar forward or backward โ lower it straight down onto the arms. This is why the dry run with an empty bar is important: it confirms the arms are at the right height to catch the bar before your sticking point.
Complete Your Setup
Frequently Bought Together
๐๏ธ XF10 (XC10) All-in-One Gym Station โ โซ Olympic Weight Plates โ ๐๏ธ Olympic Barbell โ ๐ซ Rubber Gym Flooring โ
J-Hook & Spotter Arm Set Delivery Areas โ Australia:
Sydney (NSW) ยท Parramatta ยท Bankstown ยท Liverpool ยท Penrith ยท Blacktown ยท Campbelltown ยท Bondi ยท Chatswood ยท Castle Hill ยท Northern Beaches ยท Manly ยท North Sydney ยท Mosman ยท Inner West ยท Sutherland Shire ยท Lower North Shore ยท Eastern Suburbs ยท Ryde ยท Melbourne (VIC) ยท Richmond ยท Brunswick ยท Essendon ยท Frankston ยท Dandenong ยท Geelong ยท Ballarat ยท Brisbane (QLD) ยท Fortitude Valley ยท Gold Coast ยท Sunshine Coast ยท Toowoomba ยท Rockhampton ยท Cairns ยท Adelaide (SA) ยท Glenelg ยท Norwood ยท Perth (WA) ยท Canberra (ACT) ยท Wollongong (NSW) ยท Newcastle (NSW) ยท Hobart (TAS) ยท Darwin (NT)
Sydney (NSW) ยท Parramatta ยท Bankstown ยท Liverpool ยท Penrith ยท Blacktown ยท Campbelltown ยท Bondi ยท Chatswood ยท Castle Hill ยท Northern Beaches ยท Manly ยท North Sydney ยท Mosman ยท Inner West ยท Sutherland Shire ยท Lower North Shore ยท Eastern Suburbs ยท Ryde ยท Melbourne (VIC) ยท Richmond ยท Brunswick ยท Essendon ยท Frankston ยท Dandenong ยท Geelong ยท Ballarat ยท Brisbane (QLD) ยท Fortitude Valley ยท Gold Coast ยท Sunshine Coast ยท Toowoomba ยท Rockhampton ยท Cairns ยท Adelaide (SA) ยท Glenelg ยท Norwood ยท Perth (WA) ยท Canberra (ACT) ยท Wollongong (NSW) ยท Newcastle (NSW) ยท Hobart (TAS) ยท Darwin (NT)
$82.16
Original: $273.88
-70%Premium J-Hooks & Safety Spotter Arms, 4-Piece Barbell Safety Setโ
$273.88
$82.16More Images
Premium J-Hooks & Safety Spotter Arms, 4-Piece Barbell Safety Set
In Stock โ Sydney Warehouse
๐ง XF10 (XC10) Compatible
๐ 50ร70 Uprights | 20mm Pins
๐ก๏ธ 4-Piece Safety Set
๐๏ธ J-Hooks + Spotter Arms
๐ Australia-Wide Delivery
Premium J-Hooks & Safety Spotter Arms โ 4-Piece Barbell Safety Set For XF10 (XC10) Functional Trainer Smith Machine All-in-One | Solo Training Safety | Australia
The Premium J-Hook & Safety Spotter Arm Set is a complete 4-piece barbell safety system for the XF10 (XC10) Functional Trainer Smith Machine All-in-One. The set includes one pair of heavy-duty J-hooks for barbell racking and unracking, and one pair of safety spotter arms with a protective catch surface to stop the bar if you fail a rep. Both pieces pin directly into the XF10 and G6S upright system (50mm x 70mm uprights) at any height position โ no tools, no modification. Built from commercial-grade steel with a matte black powder-coat finish matched to the XF10 frame, this set is the essential safety foundation for solo barbell training on squats, bench press, overhead press and rack pulls.
Train heavy. Train alone. Train safely. J-hooks and spotter arms are not optional safety extras โ they are the system that makes solo barbell training to failure possible. Set your J-hooks at the correct unrack height and your spotter arms one hole below your lowest safe range. The bar lands on the arms if you can't complete the rep โ not on you.
Compatible Machine This 4-piece set is designed specifically for the XF10 (XC10) Functional Trainer Smith Machine All-in-One. Both J-hooks and spotter arms pin directly into the XF10 numbered upright hole system (50mm x 70mm uprights) at any height position โ no drilling or modification required. Contact us before ordering if you are unsure which machine you own.
4PCS Complete Set
2 J-Hooks Included
2 Spotter Arms Included
MULTI Height Positions
What's in the Set
2 J-Hooks + 2 Spotter Arms โ What Each Does
J-Hooks
1 Pair โ 2 Pieces
J-hooks are the barbell catch brackets that hold the bar at your starting (unrack) position. You load the bar, set the J-hooks at the right height, unrack the bar to begin your set, and re-rack it when finished. The hook profile catches the bar collar securely between sets.
- Sets the barbell starting height for each exercise
- Holds the bar securely between sets and during loading
- Pin-adjustable to any upright position on the XF10
- Protective inner liner prevents bar knurling damage
- Used for squats, bench press, overhead press & rack pulls
Safety Spotter Arms
1 Pair โ 2 Pieces
Spotter arms are horizontal catch bars set just below your lowest working range. If you fail a rep, you lower the bar onto the spotter arms rather than being trapped under it. They are the safety net that makes training to failure without a spotter possible.
- Catches the bar at the bottom of a failed rep
- Set one hole below your lowest safe range of motion
- Raised safety lip prevents bar rolling off during a catch
- Bolt-lock collar eliminates lateral movement under load
- Multi-hole adjustment โ precise height setting for each exercise
Why buy this set rather than J-hooks or spotter arms separately?
J-hooks and spotter arms are always used together โ one positions the bar, the other catches it. Purchasing the 4-piece set ensures the finish, fit and pin dimensions are matched to the XF10 frame as a system. It also means you have both components ready to configure for any exercise from day one โ no sourcing parts individually or discovering a mismatch after purchase.
J-hooks and spotter arms are always used together โ one positions the bar, the other catches it. Purchasing the 4-piece set ensures the finish, fit and pin dimensions are matched to the XF10 frame as a system. It also means you have both components ready to configure for any exercise from day one โ no sourcing parts individually or discovering a mismatch after purchase.
How to Set Up for Safe Solo Training
4 Steps to Heavy Solo Barbell Work
1
Set the J-Hooks at Your Unrack Height Pin the J-hooks at the height where you can comfortably unrack and re-rack the barbell with a slight knee bend. The bar should be reachable without having to stretch or stand on toes โ typically just below shoulder height for squats, or at arm extension for bench press.
2
Set the Spotter Arms One Hole Below Your Bottom Range Unrack the bar without weight and perform the movement to your deepest safe position. Set the spotter arms one upright hole below that point. The bar should clear the arms throughout your full working range but make contact if you fail and need to set the bar down.
3
Lock the Bolt Collars on the Spotter Arms Tighten the bolt-lock collars on both spotter arms firmly. Check both arms are at the same height position and level before loading the bar. An uneven pair of spotter arms can cause the bar to tip sideways during a catch โ always verify both sides match.
4
Dry Run โ Then Load and Train Unrack the bar with no weight and run through the full movement range. Confirm the bar clears the spotter arms throughout and contacts them cleanly at the bottom if you were to fail. Once confirmed, load up and train with confidence.
Key Features
Premium Build โ Every Detail Counts
Commercial-Grade Heavy-Duty Steel Both J-hooks and spotter arms are built from heavy-duty steel rated for the sudden shock load of a failed barbell rep at maximum working weight โ not lightweight home gym hardware
Protective Inner Liner โ J-Hooks The J-hook catch surface is lined with a protective material that cushions the bar during re-racking and prevents knurling damage to both the barbell and the hook surface under repeated loading cycles
Raised Safety Lip โ Spotter Arms Each spotter arm features a raised front lip that prevents the barbell rolling or sliding forward off the catch surface during a failed rep โ critical on bench press where the bar can shift forward under eccentric load
Bolt-Lock Collar โ Spotter Arms The upright connection on each spotter arm uses a bolt-lock collar that clamps the arm firmly to the frame with zero lateral play โ the arm stays exactly where set, even under sudden eccentric bar catch loads
Multi-Position Height Adjustment Both J-hooks and spotter arms pin into the XF10 numbered upright hole system at any height โ configure precisely for each exercise and each user's range of motion rather than a rough approximation
Matched Matte Black Finish Powder-coated matte black finish matched to the XF10 (XC10) machine frame โ the set looks like an integrated part of the machine rather than an aftermarket add-on
What You Can Train Solo With This Set
Exercises Made Safe by J-Hooks + Spotter Arms
Upper Body
- Barbell bench press โ flat
- Barbell bench press โ incline
- Barbell overhead press (seated or standing)
- Close-grip bench press (tricep focus)
- Pin press (partial range overload)
- Barbell floor press (low catch position)
Lower Body & Full Body
- Barbell back squat
- Barbell front squat
- Barbell pause squat
- Rack pull (partial deadlift from pins)
- Barbell good morning
- Barbell hip thrust (low arm position)
Specifications
Technical Details
| Set Contents | 2ร J-hooks (1 pair) + 2ร safety spotter arms (1 pair) โ 4 pieces total |
| Compatible Machine | XF10 (XC10) Functional Trainer Smith Machine All-in-One |
| Mount Type | Pin-in upright holes โ both J-hooks and spotter arms |
| Compatible Upright Size | 50mm x 70mm rectangular uprights |
| Hole Size (Pin Diameter) | 20mm |
| Spotter Arm Lock | Bolt-lock collar โ zero lateral movement under load |
| Spotter Arm Safety Feature | Raised front lip โ prevents bar roll-off during catch |
| J-Hook Inner Surface | Protective liner โ cushions bar and prevents knurling damage |
| Height Adjustment | Multi-position โ any upright pin hole on XF10 uprights |
| Construction | Commercial-grade heavy-duty steel |
| Finish | Matte black powder coat โ matched to XF10 (XC10) frame |
| Sold As | Complete 4-piece set โ J-hooks and spotter arms together |
| Delivery | Australia-wide โ Sydney, Melbourne, Brisbane, Adelaide, Perth & regional |
Who Is This For?
The Right Set For
- Solo trainers lifting heavy on the XF10 โ J-hooks and spotter arms are the safety system that makes training to failure on squats, bench and press possible without a training partner present
- XF10 owners upgrading or replacing hardware โ if your current J-hooks or spotter arms are worn, damaged or you want a matched premium set, this is the correct compatible replacement for the XF10 (XC10)
- PT studios and commercial facilities running the XF10 โ clients train unsupervised between sessions; this complete set provides the catch system that makes the rack side of the XF10 genuinely safe for independent use
- Strength and powerlifting athletes โ training to failure on compound movements requires a reliable safety catch system; the bolt-lock collar and raised spotter lip on this set are built for the forces involved in a real failed rep under maximum load
- Home gym owners who train without a spotter โ the most common reason home gym users avoid heavy pressing and squatting is the absence of a catch system. This set eliminates that limitation.
Frequently Asked Questions
Common Questions
The set includes 4 pieces total: 1 pair of J-hooks (2 pieces) and 1 pair of safety spotter arms (2 pieces). All four pieces are compatible with the XF10 (XC10) Functional Trainer Smith Machine All-in-One and pin into the machine uprights at any height position.
J-hooks hold the barbell at your starting (unrack) position โ you lift the bar off the J-hooks to begin a set and re-rack it when finished. Spotter arms are set below your working range as a safety catch โ if you fail a rep and cannot complete the lift, you lower the bar onto the spotter arms. Both are essential for safe solo barbell training. J-hooks without spotter arms means you have no catch if you fail a rep. Spotter arms without J-hooks means you have no way to rack and unrack the bar correctly.
No โ J-hooks and spotter arms are set at different heights. J-hooks are set at the height where you comfortably unrack and re-rack the bar. Spotter arms are set below the J-hooks โ one hole below your lowest working range of motion. The gap between J-hook height and spotter arm height is your full working range. Always do a dry run with no weight to confirm the setup before loading the bar.
The XF10 (XC10) Smith machine has its own integrated safety lock hooks on the bar itself that engage at any point in the movement by rotating the bar โ these provide the catch function for guided Smith machine exercises independently. The J-hooks and spotter arms in this set are for free barbell training through the rack system โ squats, bench press and overhead press using a standard Olympic barbell on the J-hooks. You do not need spotter arms when using the Smith machine side.
The correct height differs by exercise. For bench press: lie on your bench under the bar and lower it to your chest โ the spotter arms should be set so the bar just clears them at your chest and contacts them if you set it down. Typically 1โ2 holes below J-hook height. For squats: the spotter arms need to be low enough to allow you to reach your full squat depth โ usually around parallel or just above. The arms should catch the bar when you sink below your sticking point and cannot stand back up. Always verify with a dry run using an empty bar before adding weight.
The J-hooks are sized for standard Olympic barbells with a 50mm sleeve diameter โ which covers the vast majority of Olympic bars used for squats, bench press and overhead press. If you are using a specialty bar with a different sleeve profile, contact us to confirm fitment before ordering. The hook depth and liner are designed to hold the bar securely without the bar rocking or shifting between reps.
Both J-hooks and spotter arms are built from commercial-grade heavy-duty steel rated for the working loads used on the XF10 machine under typical strength training conditions. The spotter arms are specifically designed to absorb the sudden impact load of a failed barbell rep โ which is a significantly higher force than a controlled re-rack. If you are planning extreme loading (400kg+) for powerlifting competition training, contact us to discuss suitability. For all standard gym and commercial training use cases, this set is rated for the task.
A bench is required for barbell bench press โ the J-hooks and spotter arms position the bar but you need a flat or adjustable bench to lie on underneath. For squats, overhead press and rack pulls no bench is needed โ you stand inside the rack formed by the XF10 uprights and work directly from the J-hooks. An adjustable bench is one of the most common additions purchased alongside this set for XF10 owners who want to perform the full range of barbell pressing exercises.
When you reach failure on a squat with spotter arms set correctly, continue to lower the bar in a controlled descent until it contacts the spotter arms โ do not drop it suddenly. The arms absorb the load and you step or duck out from under the bar. If you lose control suddenly, the arms will catch the bar regardless, but a controlled descent onto the arms causes less shock to the machine frame and reduces noise. Never attempt to dump the bar forward or backward โ lower it straight down onto the arms. This is why the dry run with an empty bar is important: it confirms the arms are at the right height to catch the bar before your sticking point.
Complete Your Setup
Frequently Bought Together
๐๏ธ XF10 (XC10) All-in-One Gym Station โ โซ Olympic Weight Plates โ ๐๏ธ Olympic Barbell โ ๐ซ Rubber Gym Flooring โ
J-Hook & Spotter Arm Set Delivery Areas โ Australia:
Sydney (NSW) ยท Parramatta ยท Bankstown ยท Liverpool ยท Penrith ยท Blacktown ยท Campbelltown ยท Bondi ยท Chatswood ยท Castle Hill ยท Northern Beaches ยท Manly ยท North Sydney ยท Mosman ยท Inner West ยท Sutherland Shire ยท Lower North Shore ยท Eastern Suburbs ยท Ryde ยท Melbourne (VIC) ยท Richmond ยท Brunswick ยท Essendon ยท Frankston ยท Dandenong ยท Geelong ยท Ballarat ยท Brisbane (QLD) ยท Fortitude Valley ยท Gold Coast ยท Sunshine Coast ยท Toowoomba ยท Rockhampton ยท Cairns ยท Adelaide (SA) ยท Glenelg ยท Norwood ยท Perth (WA) ยท Canberra (ACT) ยท Wollongong (NSW) ยท Newcastle (NSW) ยท Hobart (TAS) ยท Darwin (NT)
Sydney (NSW) ยท Parramatta ยท Bankstown ยท Liverpool ยท Penrith ยท Blacktown ยท Campbelltown ยท Bondi ยท Chatswood ยท Castle Hill ยท Northern Beaches ยท Manly ยท North Sydney ยท Mosman ยท Inner West ยท Sutherland Shire ยท Lower North Shore ยท Eastern Suburbs ยท Ryde ยท Melbourne (VIC) ยท Richmond ยท Brunswick ยท Essendon ยท Frankston ยท Dandenong ยท Geelong ยท Ballarat ยท Brisbane (QLD) ยท Fortitude Valley ยท Gold Coast ยท Sunshine Coast ยท Toowoomba ยท Rockhampton ยท Cairns ยท Adelaide (SA) ยท Glenelg ยท Norwood ยท Perth (WA) ยท Canberra (ACT) ยท Wollongong (NSW) ยท Newcastle (NSW) ยท Hobart (TAS) ยท Darwin (NT)
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
In Stock โ Sydney Warehouse
๐ง XF10 (XC10) Compatible
๐ 50ร70 Uprights | 20mm Pins
๐ก๏ธ 4-Piece Safety Set
๐๏ธ J-Hooks + Spotter Arms
๐ Australia-Wide Delivery
Premium J-Hooks & Safety Spotter Arms โ 4-Piece Barbell Safety Set For XF10 (XC10) Functional Trainer Smith Machine All-in-One | Solo Training Safety | Australia
The Premium J-Hook & Safety Spotter Arm Set is a complete 4-piece barbell safety system for the XF10 (XC10) Functional Trainer Smith Machine All-in-One. The set includes one pair of heavy-duty J-hooks for barbell racking and unracking, and one pair of safety spotter arms with a protective catch surface to stop the bar if you fail a rep. Both pieces pin directly into the XF10 and G6S upright system (50mm x 70mm uprights) at any height position โ no tools, no modification. Built from commercial-grade steel with a matte black powder-coat finish matched to the XF10 frame, this set is the essential safety foundation for solo barbell training on squats, bench press, overhead press and rack pulls.
Train heavy. Train alone. Train safely. J-hooks and spotter arms are not optional safety extras โ they are the system that makes solo barbell training to failure possible. Set your J-hooks at the correct unrack height and your spotter arms one hole below your lowest safe range. The bar lands on the arms if you can't complete the rep โ not on you.
Compatible Machine This 4-piece set is designed specifically for the XF10 (XC10) Functional Trainer Smith Machine All-in-One. Both J-hooks and spotter arms pin directly into the XF10 numbered upright hole system (50mm x 70mm uprights) at any height position โ no drilling or modification required. Contact us before ordering if you are unsure which machine you own.
4PCS Complete Set
2 J-Hooks Included
2 Spotter Arms Included
MULTI Height Positions
What's in the Set
2 J-Hooks + 2 Spotter Arms โ What Each Does
J-Hooks
1 Pair โ 2 Pieces
J-hooks are the barbell catch brackets that hold the bar at your starting (unrack) position. You load the bar, set the J-hooks at the right height, unrack the bar to begin your set, and re-rack it when finished. The hook profile catches the bar collar securely between sets.
- Sets the barbell starting height for each exercise
- Holds the bar securely between sets and during loading
- Pin-adjustable to any upright position on the XF10
- Protective inner liner prevents bar knurling damage
- Used for squats, bench press, overhead press & rack pulls
Safety Spotter Arms
1 Pair โ 2 Pieces
Spotter arms are horizontal catch bars set just below your lowest working range. If you fail a rep, you lower the bar onto the spotter arms rather than being trapped under it. They are the safety net that makes training to failure without a spotter possible.
- Catches the bar at the bottom of a failed rep
- Set one hole below your lowest safe range of motion
- Raised safety lip prevents bar rolling off during a catch
- Bolt-lock collar eliminates lateral movement under load
- Multi-hole adjustment โ precise height setting for each exercise
Why buy this set rather than J-hooks or spotter arms separately?
J-hooks and spotter arms are always used together โ one positions the bar, the other catches it. Purchasing the 4-piece set ensures the finish, fit and pin dimensions are matched to the XF10 frame as a system. It also means you have both components ready to configure for any exercise from day one โ no sourcing parts individually or discovering a mismatch after purchase.
J-hooks and spotter arms are always used together โ one positions the bar, the other catches it. Purchasing the 4-piece set ensures the finish, fit and pin dimensions are matched to the XF10 frame as a system. It also means you have both components ready to configure for any exercise from day one โ no sourcing parts individually or discovering a mismatch after purchase.
How to Set Up for Safe Solo Training
4 Steps to Heavy Solo Barbell Work
1
Set the J-Hooks at Your Unrack Height Pin the J-hooks at the height where you can comfortably unrack and re-rack the barbell with a slight knee bend. The bar should be reachable without having to stretch or stand on toes โ typically just below shoulder height for squats, or at arm extension for bench press.
2
Set the Spotter Arms One Hole Below Your Bottom Range Unrack the bar without weight and perform the movement to your deepest safe position. Set the spotter arms one upright hole below that point. The bar should clear the arms throughout your full working range but make contact if you fail and need to set the bar down.
3
Lock the Bolt Collars on the Spotter Arms Tighten the bolt-lock collars on both spotter arms firmly. Check both arms are at the same height position and level before loading the bar. An uneven pair of spotter arms can cause the bar to tip sideways during a catch โ always verify both sides match.
4
Dry Run โ Then Load and Train Unrack the bar with no weight and run through the full movement range. Confirm the bar clears the spotter arms throughout and contacts them cleanly at the bottom if you were to fail. Once confirmed, load up and train with confidence.
Key Features
Premium Build โ Every Detail Counts
Commercial-Grade Heavy-Duty Steel Both J-hooks and spotter arms are built from heavy-duty steel rated for the sudden shock load of a failed barbell rep at maximum working weight โ not lightweight home gym hardware
Protective Inner Liner โ J-Hooks The J-hook catch surface is lined with a protective material that cushions the bar during re-racking and prevents knurling damage to both the barbell and the hook surface under repeated loading cycles
Raised Safety Lip โ Spotter Arms Each spotter arm features a raised front lip that prevents the barbell rolling or sliding forward off the catch surface during a failed rep โ critical on bench press where the bar can shift forward under eccentric load
Bolt-Lock Collar โ Spotter Arms The upright connection on each spotter arm uses a bolt-lock collar that clamps the arm firmly to the frame with zero lateral play โ the arm stays exactly where set, even under sudden eccentric bar catch loads
Multi-Position Height Adjustment Both J-hooks and spotter arms pin into the XF10 numbered upright hole system at any height โ configure precisely for each exercise and each user's range of motion rather than a rough approximation
Matched Matte Black Finish Powder-coated matte black finish matched to the XF10 (XC10) machine frame โ the set looks like an integrated part of the machine rather than an aftermarket add-on
What You Can Train Solo With This Set
Exercises Made Safe by J-Hooks + Spotter Arms
Upper Body
- Barbell bench press โ flat
- Barbell bench press โ incline
- Barbell overhead press (seated or standing)
- Close-grip bench press (tricep focus)
- Pin press (partial range overload)
- Barbell floor press (low catch position)
Lower Body & Full Body
- Barbell back squat
- Barbell front squat
- Barbell pause squat
- Rack pull (partial deadlift from pins)
- Barbell good morning
- Barbell hip thrust (low arm position)
Specifications
Technical Details
| Set Contents | 2ร J-hooks (1 pair) + 2ร safety spotter arms (1 pair) โ 4 pieces total |
| Compatible Machine | XF10 (XC10) Functional Trainer Smith Machine All-in-One |
| Mount Type | Pin-in upright holes โ both J-hooks and spotter arms |
| Compatible Upright Size | 50mm x 70mm rectangular uprights |
| Hole Size (Pin Diameter) | 20mm |
| Spotter Arm Lock | Bolt-lock collar โ zero lateral movement under load |
| Spotter Arm Safety Feature | Raised front lip โ prevents bar roll-off during catch |
| J-Hook Inner Surface | Protective liner โ cushions bar and prevents knurling damage |
| Height Adjustment | Multi-position โ any upright pin hole on XF10 uprights |
| Construction | Commercial-grade heavy-duty steel |
| Finish | Matte black powder coat โ matched to XF10 (XC10) frame |
| Sold As | Complete 4-piece set โ J-hooks and spotter arms together |
| Delivery | Australia-wide โ Sydney, Melbourne, Brisbane, Adelaide, Perth & regional |
Who Is This For?
The Right Set For
- Solo trainers lifting heavy on the XF10 โ J-hooks and spotter arms are the safety system that makes training to failure on squats, bench and press possible without a training partner present
- XF10 owners upgrading or replacing hardware โ if your current J-hooks or spotter arms are worn, damaged or you want a matched premium set, this is the correct compatible replacement for the XF10 (XC10)
- PT studios and commercial facilities running the XF10 โ clients train unsupervised between sessions; this complete set provides the catch system that makes the rack side of the XF10 genuinely safe for independent use
- Strength and powerlifting athletes โ training to failure on compound movements requires a reliable safety catch system; the bolt-lock collar and raised spotter lip on this set are built for the forces involved in a real failed rep under maximum load
- Home gym owners who train without a spotter โ the most common reason home gym users avoid heavy pressing and squatting is the absence of a catch system. This set eliminates that limitation.
Frequently Asked Questions
Common Questions
The set includes 4 pieces total: 1 pair of J-hooks (2 pieces) and 1 pair of safety spotter arms (2 pieces). All four pieces are compatible with the XF10 (XC10) Functional Trainer Smith Machine All-in-One and pin into the machine uprights at any height position.
J-hooks hold the barbell at your starting (unrack) position โ you lift the bar off the J-hooks to begin a set and re-rack it when finished. Spotter arms are set below your working range as a safety catch โ if you fail a rep and cannot complete the lift, you lower the bar onto the spotter arms. Both are essential for safe solo barbell training. J-hooks without spotter arms means you have no catch if you fail a rep. Spotter arms without J-hooks means you have no way to rack and unrack the bar correctly.
No โ J-hooks and spotter arms are set at different heights. J-hooks are set at the height where you comfortably unrack and re-rack the bar. Spotter arms are set below the J-hooks โ one hole below your lowest working range of motion. The gap between J-hook height and spotter arm height is your full working range. Always do a dry run with no weight to confirm the setup before loading the bar.
The XF10 (XC10) Smith machine has its own integrated safety lock hooks on the bar itself that engage at any point in the movement by rotating the bar โ these provide the catch function for guided Smith machine exercises independently. The J-hooks and spotter arms in this set are for free barbell training through the rack system โ squats, bench press and overhead press using a standard Olympic barbell on the J-hooks. You do not need spotter arms when using the Smith machine side.
The correct height differs by exercise. For bench press: lie on your bench under the bar and lower it to your chest โ the spotter arms should be set so the bar just clears them at your chest and contacts them if you set it down. Typically 1โ2 holes below J-hook height. For squats: the spotter arms need to be low enough to allow you to reach your full squat depth โ usually around parallel or just above. The arms should catch the bar when you sink below your sticking point and cannot stand back up. Always verify with a dry run using an empty bar before adding weight.
The J-hooks are sized for standard Olympic barbells with a 50mm sleeve diameter โ which covers the vast majority of Olympic bars used for squats, bench press and overhead press. If you are using a specialty bar with a different sleeve profile, contact us to confirm fitment before ordering. The hook depth and liner are designed to hold the bar securely without the bar rocking or shifting between reps.
Both J-hooks and spotter arms are built from commercial-grade heavy-duty steel rated for the working loads used on the XF10 machine under typical strength training conditions. The spotter arms are specifically designed to absorb the sudden impact load of a failed barbell rep โ which is a significantly higher force than a controlled re-rack. If you are planning extreme loading (400kg+) for powerlifting competition training, contact us to discuss suitability. For all standard gym and commercial training use cases, this set is rated for the task.
A bench is required for barbell bench press โ the J-hooks and spotter arms position the bar but you need a flat or adjustable bench to lie on underneath. For squats, overhead press and rack pulls no bench is needed โ you stand inside the rack formed by the XF10 uprights and work directly from the J-hooks. An adjustable bench is one of the most common additions purchased alongside this set for XF10 owners who want to perform the full range of barbell pressing exercises.
When you reach failure on a squat with spotter arms set correctly, continue to lower the bar in a controlled descent until it contacts the spotter arms โ do not drop it suddenly. The arms absorb the load and you step or duck out from under the bar. If you lose control suddenly, the arms will catch the bar regardless, but a controlled descent onto the arms causes less shock to the machine frame and reduces noise. Never attempt to dump the bar forward or backward โ lower it straight down onto the arms. This is why the dry run with an empty bar is important: it confirms the arms are at the right height to catch the bar before your sticking point.
Complete Your Setup
Frequently Bought Together
๐๏ธ XF10 (XC10) All-in-One Gym Station โ โซ Olympic Weight Plates โ ๐๏ธ Olympic Barbell โ ๐ซ Rubber Gym Flooring โ
J-Hook & Spotter Arm Set Delivery Areas โ Australia:
Sydney (NSW) ยท Parramatta ยท Bankstown ยท Liverpool ยท Penrith ยท Blacktown ยท Campbelltown ยท Bondi ยท Chatswood ยท Castle Hill ยท Northern Beaches ยท Manly ยท North Sydney ยท Mosman ยท Inner West ยท Sutherland Shire ยท Lower North Shore ยท Eastern Suburbs ยท Ryde ยท Melbourne (VIC) ยท Richmond ยท Brunswick ยท Essendon ยท Frankston ยท Dandenong ยท Geelong ยท Ballarat ยท Brisbane (QLD) ยท Fortitude Valley ยท Gold Coast ยท Sunshine Coast ยท Toowoomba ยท Rockhampton ยท Cairns ยท Adelaide (SA) ยท Glenelg ยท Norwood ยท Perth (WA) ยท Canberra (ACT) ยท Wollongong (NSW) ยท Newcastle (NSW) ยท Hobart (TAS) ยท Darwin (NT)
Sydney (NSW) ยท Parramatta ยท Bankstown ยท Liverpool ยท Penrith ยท Blacktown ยท Campbelltown ยท Bondi ยท Chatswood ยท Castle Hill ยท Northern Beaches ยท Manly ยท North Sydney ยท Mosman ยท Inner West ยท Sutherland Shire ยท Lower North Shore ยท Eastern Suburbs ยท Ryde ยท Melbourne (VIC) ยท Richmond ยท Brunswick ยท Essendon ยท Frankston ยท Dandenong ยท Geelong ยท Ballarat ยท Brisbane (QLD) ยท Fortitude Valley ยท Gold Coast ยท Sunshine Coast ยท Toowoomba ยท Rockhampton ยท Cairns ยท Adelaide (SA) ยท Glenelg ยท Norwood ยท Perth (WA) ยท Canberra (ACT) ยท Wollongong (NSW) ยท Newcastle (NSW) ยท Hobart (TAS) ยท Darwin (NT)
