Keyless Drill Chuck Designed specifically for high accuracy applications on either conventional or CNC equipment heavy duty Taper-fitting & Thread mounted Keyless Drill Chuckautomatic drill chuckcollet, chuck, cnc tool,tap holder, cutting tool are availableTaper Holes:Metric sizes: Inch sizes: 10mm B12 3/8" JT2 13mm B16 1/2" JT33 16mm B16 5/8" JT6,JT3 20mm B22 3/4" JT3 Thread Holes: 10mm 3/8- ...