The BSTLJHX features a quick-locking latch and premium gripping surface to ensure safety and security from falls and drops. Slim, light and durable, BSTLJHX are designed for use with all 50mm (2" ) weight lifting bars. Body-Solid Tools Lock Jaw Hex Collars are ideal for home and commercial facilities, group and functional fitness classes as well as high schools and universities. DESIGN & DETAILS: Secure weight plates in place Protect bar finish Quick-locking latch ensures reliability Slim, light and durable Designed for use with all 50mm (2" ) bars Ideal for home, commercial facilities, group and functional fitness & high schools/universities