Collet, Collet Chuck manufacturer / supplier in China, offering CNC Tool Holder with Bt Shrink Fit Chuck Steel Material for Milling Cutter Core Components Bearing Fits Bt30 Bt40 Bt50 Mas403, Vdi Tool Holder B Style B1 B2 B3 B4 B5 B6 B7 B8, Vdi C Style Tool Holder CNC Machine Coller Chuck and so on.