Description ER A M Type Nut Collet Clamping Nut for CNC Milling Chuck Holder Lathe ToolSpecifications Product NameCollet Clamping NutMaterial45H Carbon SteelSurface TreatmentBlack OxideColorDark Grey SilverQuantity1 Pc Collet Clamping NutTypeER8AER8MER11AER11MER16AER16MER20AER20MSize12345678Size approx 1 2 1 3cm1 2 1 1cm1 4 1 8cm1 2 1 6cm1 9 2 2cm1 4 2 8cm2 2 3 3cm2 2 8cmFeatures A M type nut for ER Collet milling CNC chuck holder Hardened and precision ground Eccentric retainer for collet auto Release Notice The Collet Nut can not be replace A type and M type is not the same Package Included 1xCollet Clamping NutMore Details