Features 100% brand new and high quality Scope of application: suitable for the nuts' removal of ER40UM type cutter bar, cutter handle and extension rod ER wrench features: simple operation, low price, high labor intensity Use of ER wrench: tighten it, hold the end of the wrench with your hand, and tighten it clockwise. Loosen, rotate counterclockwise. Wrench opening is 58mm, suitable for ER40-UM nut Features: 100% brand new and high quality Scope of application: suitable for the nuts' removal of ER40UM type cutter bar, cutter handle and extension rod ER wrench features: simple operation, low price, high labor intensity Use of ER wrench: tighten it, hold the end of the wrench with your hand, and tighten it clockwise. Loosen, rotate counterclockwise. Wrench opening is 58mm, suitable for ER40-UM nut Specification: Type:ER40UM Wrench Wrench opening: 58mm Weight: Approx.432g/15.2oz Package list: 1 xER16M Wrench(only) Package List