Olympic Barbell Clamps Aluminum (Pair) ClipsOur Barbell Collars fit securely around a standard 2 diameter Olympic barbell to provide a resilient, wont let up grip to keep your bumper plates in place no matter how many you have on the bar! These Collars are made from durable and lightweight aluminum. Unlike plastic competitors, our collars have a rubberized lining to ensure a strong hold and protect the bar. This grip pad runs the circumference of the bar to provide even, locked in support. Our