Fits 420 Rancher 64mm Rear Differential Pinion Bearing Nut Socket Tool.This tool is compatible with TRX420 models including TRX420TE, TRX420TM, TRX420FE, TRX420FPE, TRX420FPM, TRX420FM, TRX420FA, TRX420FPA, TRX420FA1, TRX420FA2, TRX420FA5, TRX420FA6, and TRX420FM for model years 2007–2018.It is also compatible with TRX450ES, TRX450S, TRX450FE, TRX450FM (1998–2004), TRX650FA and TRX650FGA (2003–2005, rear only), and TRX680FA and TRX680FGA (2006–2018).Designed for use on the rear differential pinion bearing lock nut.Constructed from cold rolled steel with a knurled finish for hand turning.Replaces OEM part numbers 07916-MB00001 and 07916-MB00002.Includes one rear differential pinion bearing nut socket tool.