Lock-Jaw Pro Collars

Name: Lock-Jaw Pro Collars
Brand: Lock-Jaw Collars
Rating: 4.51 (15 reviews)

The Lock-Jaw PRO is a clamp-style barbell collar from Lock-Jaw (Avus Design), built around a spring-loaded snap latch, elastomer pressure pads, and a reinforced resin frame – the manufacturer describes it as a 50%+ strength and holding-power upgrade over the original Lock-Jaw design. A larger lever gives one-handed installation and removal, and a spring-loaded secondary locking tab keeps the lever from popping open under heavy impact – a feature exclusive to the Pro family (Pro, Pro Magnet, Pro Axle) in Lock-Jaw’s lineup. It ships in Black, Red, Blue, and Pink, and sells as a non-magnetic pair; a magnet-equipped “PRO with MAGNET” variant is sold separately for collectors who want rack storage.

Independent testing backs up the marketing: King of the Gym’s drop testing found only 0.25-0.5mm of plate movement across repeated drops, and Garage Gym Reviews calls it “a durable and budget-friendly barbell collar that we keep coming back to.” GymRadar’s aggregate from 15 gym owners sits at 4.51/5, with build quality (4.73) rated higher than performance (4.33). The main recurring caveat isn’t about the base Pro itself but its magnet-equipped sibling: an r/homegym reviewer reports the PRO with MAGNET’s side-mounted magnets hold weakly on squat-rack uprights and can slide off under a hard re-rack.

Colors	Black, Red, Blue, Pink
Magnets	none on the standard PRO (magnet variant sold separately as "PRO with MAGNET")
Sold as	pair
Material	resin frame with elastomer pressure pads
Warranty	1-year manufacturer warranty (per Garage Gym Reviews)
Collar diameter	2" / 50mm (standard Olympic sleeve)
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 Collars	Eleiko Oppen Barbell Collars	USA Aluminum Collars	Rogue OSO Magnetic Barbell Collars 2.0
GymRadar rating	4.51/5	4.53/5	4.53/5	4.47/5
Price	$44.95		$45.00	$65.00
Colors	Black, Red, Blue, Pink
Magnets	none on the standard PRO (magnet variant sold separately as "PRO with MAGNET")			4 high-strength magnets (2 per face), mechanically pressed into machined pockets for rack storage
Sold as	pair	pair		pair
Material	resin frame with elastomer pressure pads	Aluminium casing with NBR rubber interior lining	6061 billet aluminum	6061 billet aircraft-grade aluminum
Warranty	1-year manufacturer warranty (per Garage Gym Reviews)	1-year		2-year coverage for material and workmanship defects
Collar diameter	2" / 50mm (standard Olympic sleeve)
Locking mechanism	spring-loaded snap latch with secondary locking tab

4.5/5 · 15 GymRadar reviews

Reviews by source

Expert	4.51/5	15 reviews
Youtube	4.3/5	3 reviews

The Lock-Jaw PRO is a clamp-style barbell collar built around a spring-loaded snap latch, elastomer pads, and a reinforced resin frame – and it delivers on the fundamentals reviewers care about most. Functionality is the standout: King of the Gym’s drop testing found only 0.25-0.5mm of plate movement across repeated drops, and Garage Gym Reviews calls it a “durable and budget-friendly barbell collar that we keep coming back to.” A spring-loaded secondary locking tab keeps the lever from popping open under heavy impact, though it adds a small step to one-handed removal. Versatility is the weakest dimension: the standard PRO has no magnets for rack storage, and the magnet-equipped PRO with MAGNET variant draws a specific complaint from r/homegym that its side magnets hold weakly and can slide off uprights under a hard re-rack.

+Functionality: only 0.25-0.5mm of plate movement across repeated drop tests (King of the Gym)
+Functionality: spring-loaded secondary locking tab prevents the lever popping open under heavy impact (King of the Gym)
+Build quality: larger lever and spring-loaded snap latch make one-handed install/removal easy (manufacturer, Garage Gym Reviews)
+Value: durable and budget-friendly at $44.95, well under premium alternatives (Garage Gym Reviews)
+Durability: GymRadar reviewers report years of commercial-gym and cold-garage use with no breakage (GymRadar)

−Versatility: the standard PRO has no magnets, so it can't rack-mount to steel uprights (manufacturer, GymRadar reviewer)
−Versatility: the magnet-equipped PRO with MAGNET variant's side magnets hold weakly and can slide off uprights on a hard re-rack (r/homegym)
−Build quality: one GymRadar reviewer (of 15) reported difficulty closing the collar on some sleeves and discarded the pair (GymRadar)
−Durability: Garage Gym Reviews notes only a 1-year warranty term

$44.95

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