BT 30 BT40 Precision ER Tool Holders for CNC Machines BT30-ER32 Tool Holders, BT40 ER Toolholders BT Tool Holders: Taper BT30, Collet size: ER32, Length: 60mm ISO standard size with good quality. Collet Chuck accepts all ER32 collets Works on all BT 30 machine Material is 1065 Carbon Steel Hardened & Precision Ground BT30 Tool Holder Cone with Pull Post and Collet Nut Total weight: 0.8 kg Taper BT40, Collet size: ER32, Length: 70mm Machine tool spindle interface: BT40 Also we can supply you HSK63F, ISO15, ISO20-ER16/20, ISO30, NBT30 tool holders, etc.