GORILLA SPORTS Olympic barbell collars set chromed &ndash; Screw clamps Pair with 2 inch diameter GORILLA SPORTS BARBELL CLAMPS  are suitable for all bars with a 50mm diameter and smooth receiving area USE / TRAINING  for a quick and easy change between olympic weights HIGHLIGHTS  easy to open and prevent weight plates from slipping and sliding - Quick relase locks are made from high quality chrome and offer maximum security for a fast exchange of weight plates - are fixed perfectly DIMENSIONS  Diameter: 2 inch; for Olympic dumbells TRANSMISSION  1 x Pair of Olympic Screw Collars for 50mm weight bars