Lock-Jaw Pro Magnet Collars

Name: Lock-Jaw Pro Magnet Collars
Brand: Lock-Jaw Collars
Rating: 4.78 (3 reviews)

The Lock-Jaw Pro Magnet Collars are the magnetic variant of Lock-Jaw’s Pro barbell collar, adding built-in magnets to a design that already offers 50%+ more holding power than the original Lock-Jaw collar. Each pair is made of a composite resin-and-rubber shell with elastomer pads that protect bars and plates from scuffing, weighs about 1.1 lb per collar, and fits standard 2” (50mm) Olympic barbell sleeves. The dual-sided magnets sit on the sides of the collar so it lies flush when stuck to a squat rack or rig – independent testing from King of the Gym rates this the best magnet placement in the entire Lock-Jaw lineup, unlike the Flex or Metal models where the magnets protrude. A spring-loaded snap latch allows one-handed installation and removal, while a secondary locking tab – shared only with the Pro and Pro Axle models – adds a fail-safe against the lever popping open during high-impact drops. Lock-Jaw backs the collars with a 1-year warranty.

Colors	Grey, Blue, Red, Black/Red (availability varies by retailer)
Weight	~1.1 lb per collar
Made in	USA
Magnets	Dual-sided, positioned on the sides for flush rack storage
Material	Composite resin & rubber with embedded magnets, elastomer pads
Warranty	1 year
Dimensions	3.5" L x 3.5" W x 2" H per collar
Manufacturer	Lock-Jaw
Sleeve diameter	2" (50 mm) Olympic
Locking mechanism	Spring-loaded snap latch with secondary locking tab

What is a Collar?

What barbell collars are

Collars (clips) lock the plates onto a barbell’s sleeves so they can’t slide or rattle off — a safety essential, especially for pressing and Olympic lifts. The common types: cheap spring clips, quick lock-jaw / quick-release collars (the everyday favorite — fast and secure), and competition collars (precision-weighted, 2.5 kg each, for calibrated meets).

What to look for

A secure clamp that won’t creep under drops or high reps, quick on-and-off operation, and a fit for your bar’s sleeve diameter (standard Olympic is 50 mm). For most home gyms, a pair of lock-jaw-style collars is the right balance of speed, grip, and price.

How it compares

	Lock-Jaw Pro Magnet Collars	Rogue USA Aluminum Collars - Magnetic	HG 2.0 Collars	Rogue OSO Barbell Collars 2.0
GymRadar rating	4.78/5	4.79/5	4.76/5	4.81/5
Price	$54.99		$50.00	$55.00
Colors	Grey, Blue, Red, Black/Red (availability varies by retailer)
Weight	~1.1 lb per collar		0.85 lb/pair
Made in	USA	USA (magnets imported)		USA
Magnets	Dual-sided, positioned on the sides for flush rack storage	Two N45 neodymium magnets per side (four total per collar)
Material	Composite resin & rubber with embedded magnets, elastomer pads	6061 aircraft-grade billet aluminum with rubberized interior lining	nylon resin	6061 billet aircraft-grade aluminum
Warranty	1 year			2-year coverage for material and workmanship defects
Dimensions	3.5" L x 3.5" W x 2" H per collar
Manufacturer	Lock-Jaw
Sleeve diameter	2" (50 mm) Olympic
Locking mechanism	Spring-loaded snap latch with secondary locking tab

4.8/5 · 3 GymRadar reviews

Reviews by source

Expert	4.78/5	3 reviews
Youtube	4.3/5	2 reviews

The Lock-Jaw Pro Magnet earns its premium price with what King of the Gym’s full-lineup teardown calls the best magnet placement in the Lock-Jaw catalog – positioned on the sides so it sits flush against a rack rather than protruding – plus a spring-loaded secondary locking tab (shared only with the Pro and Pro Axle) that keeps the lever from popping open on high-impact drops. Build quality is the standout: drop testing showed only 0.25-0.5mm of migration across six drops of 245 lb, even with intentionally uneven impacts. Value is the weakest dimension – at $55 it costs $10 more than the otherwise-identical non-magnetic Pro purely for the storage convenience, and vertical-hold testing under sustained bodyweight stress showed several inches of migration, though the reviewer notes that scenario doesn’t reflect real training.

+Functionality: spring-loaded secondary locking tab prevents the lever from popping open during high-impact drops, a feature unique to the Pro family (King of the Gym)
+Build quality: best magnet placement in the Lock-Jaw lineup -- positioned on the sides so the collar sits flush against a rack instead of protruding, unlike the Flex or Metal models (King of the Gym)
+Durability: only 0.25-0.5mm of movement across six drops of 245 lb, even with intentionally uneven impacts (King of the Gym)
+Functionality: one-handed on/off via a spring-loaded snap latch, described as comparable in ease to the non-locking Olympic model (King of the Gym; YouTube: KevTheTrainer)
+Versatility: elastomer pads and a resin frame protect bars and plates from scuffing, and it's built for bumper plates and high-impact workouts (manufacturer)

−Durability: vertical hold testing showed several inches of migration once bodyweight stomping was added, though the reviewer notes this doesn't reflect real training scenarios (King of the Gym)
−Value: at $55 it costs $10 more than the otherwise-identical non-magnetic Pro model, a premium paid purely for magnetic rack storage (King of the Gym)
−Functionality: removing the collar takes slightly more effort than non-locking models because the secondary locking tab has to be disengaged first (King of the Gym)
−Value: the closest independent editorial review found (Garage Gym Reviews) covers the non-magnetic Pro-2 family generally and doesn't confirm it tested this magnet SKU specifically, leaving coverage thinner than ideal (knowledge base research)

$54.99

Buy Now