Put your bumper plates in their place – and keep them there! The MD Buddy 2” Olympic Locking Collars lock tight at the end of your Olympic bar, thanks to each nylon collar’s easy-to-use permanent snap-latch. With greater retention force than regular spring collars, these tenacious hexagonal clamps hold your weight plates securely in place no matter how much force you put behind your lifts. That makes every workout safe for you while helping to prolong the life of your bumper plates.