Wavetek hammer delivers a louder, longerlasting, more consistent chime \n Refined Oi aesthetic with tapered edges and intricate laser etching \n Hinged clamp installs over bar in seconds, built in cable management system \n Aluminum ring offered in a variety of colors \n Small fits 22.2mm bars \n Large size includes shims to fit 23.831.8mm bars \n 2 year warranty