Barbell Collars, FrontTech Quick Release Non-slip Barbell Clamp Collars for 1-Inch or 2-Inch Diameter Size Olympic Bars Pro Crossfit Exercise & Weight Training (2pcs/ A pair) Non-slip and Safer: compare to the metal collar, it is more stable and non-slip; it has spring powered snap-latch design to keep you safe so you can focus on your gym workout Easy to Use: quick release, it takes less then 5 seconds to install Superior Durability: it's made of ABS and rubber pressure pads inside Fast Locking And Release Action, Barbell Locking Clips Are Perfect For Cast Plates and Professional Bodybuilders Weight: approx. 50g/pcs