Features: NYLON MATERIAL: Manufactured from high-strength nylon material, this set of clips are durable in long-term use and solid under high pressure. QUICK RELEASE: Quick locking and release design makes this barbell collar easy to open and close when changing the working weight. The installation is time-saving. 2CLAMPS: With the inner diameter of 2 inches / 50mm, it can be used for the bar with diameter of 50mm. SAFETY: This barbell collar has two rubber pads on both sides, and it can increase the friction so that the collar can lock tightly into place. OCCASIONS: Perfect for fitness training, Olympic lifts, overhead press and weightlifting.