Zion’s 2" Barbell Collar Clamps are compatible with any standard Olympic barbell sleeve. These feature a rubber lock-open lever with a snap flexure, enabling the user to fully open the collar for easier installation on the bar. An interior rubber lining helps to prevent any scuffs or friction as you train. A set screw allows for smoother lever action and longer lifespan for maximum return. Stability and durability are vital for the high intensity weightlifter, and Zion's barbell clamps deliver that and more. Repeatedly tested at the highest level of competition, these collars are effective, lightweight, and durable at an affordable price. Compatible with standard Olympic weightlifting bars, as well as many specialty 2" bars alike.