2" Olympic Lockjaw Barbell Collars, Set of 2, Aircraft Grade Aluminum Design, 4 Colors SUPERIOR GRIP OVER PLASTIC COLLARS - Our barbell collars have a ruberized lining to grip and protect the bar. The grip pad runs the entire length of the inside of the collar, where plastic collars only have 2 gripping points. Giving our collars superior gripping power. QUICK RELEASE LOCKING CLAMP LEVER FOR A SECURE HOLD - Our barbell collars are equiped with a simple lever, that offers not only a secure and stable hold they also allow for easy adjustments or removal. WEIGHTLIFTING ACCESSORIES DESIGNED FOR 50MM OLYMPIC BARBELLS OR DUMBBELLS - We have designed these collars to securely hold your weight plates on 2"(50mm) olympic barbells or dunbbells. MUST HAVE BARBELL COLLARS FOR CROSSFIT, POWERLIFTING AND REPEATED HIGH-IMPACT DROPS - Whether you like to drop or throw your barbell after a lift these collars will remain stable and in place. Securely hold your weights when performing crossfit, powerlifting, weightlifting, strong lifts or any other olymic bar workout. MADE FROM AIRCRAFT GRADE ALUMINIUM - Our olympic barbell collars are made from aircraft grade aluminium and currently come in 4 colors, red, blue, black and silver. More colors to come shortly.