Sold in a set of four, the T-2 Series Weight Plate Holders are the perfect solution to storing your weight plates. Designed with a J-hook style mounting system that allows you to install the hooks to your rack within seconds. Easily clip the mounting system into the uprights by inserting the pin and twisting the bars down. No hardware required. The 50 mm diameter sleeves fit Olympic weight plates and have a loadable sleeve length of 8" to fit multiple plates.