This bearing retainer installation / remover tool Compatible for CRF450R, CRF450X, CRF250R and newer CR250 The retainer tool has 47mm diameter and the tooth width is 4.6mm. Please check your retainer to make sure it will fit. Tool comes with black oxide finish preventing corrosion to assure many years of service. This tool is not made in China or Hong Kong. It is professionally made in the USA on the state of the art CNC equipment with 100% quality inspection.