[High-Quality Materials] 1 inch Barbell spinlock collars are made of quality material for lasting use, Non -slip, earthquake resistance, is the first choice for sports enthusiasts. [Spinlock Collars are easy and quick] way to move your plates around. They also keep weight plates securely and safely while lifting. [Safe use] Spinlock Collars are easy and quick ways to move your plates around. Safe and Secure to provide balance and stability. [The gift of the sportsman] The spinlock collar clamp is suitable for barbell dumbell weight lifting and etc You can also send them as a gift to your friends and families especially sport. [Purpose] Special for environmental protection dumbbell bar hollow dumbbell bar. These vinyl spin lock collars can be used on 1" standard weight lifting barbell or dumbbell bar! 5 in total, if there is only one barbell or dumbbell, you can lock 2 on the side! Then all parties will not slide.