This 1" Inch Olympic Barbell Clamps Quick Release Locking Collar Clips Weightlifting set includes one pair of black plastic locking collar clips. They are designed to fit 1" diameter Olympic bars and are ideal for weightlifting and strength training. These collar clips are easy to use and provide a secure grip that will keep your weight plates from slipping during your workout. Get the ultimate Olympic barbell experience with these quick-release locking collar clips that will enhance your workout routine.