The Olympic adapter 50 mm Gorilla Sports is suitable for adapting bars with a diameter of 30 mm to Olympic bars. In this way, the bar will accommodate weights with a bore of 51 mm . This adapter is designed to be fitted to 30 mm threaded bars, and is secured using the screws and allen key included. This set of 2 adapters diameter 50 mm (Olympic) is made of high-quality chromed steel with rounded plastic end. 2 spring-loaded stops are included. Main features:Adapter 2x 50 mm. For bar diameter 30 mm and minimum length 27 cm. Includes 2 spring locks. Suitable only for barbells with smooth support. For use with Olympic weights from 51 mm. Width: 23 cm on each side.