[Capacity]: 1/32" - 1/2", Mt2 Drill Press Chuck Overall Length: 86mm (3.4”). Accuracy: 0.005", Chuck Mount : JT33; [Packing]: Includes the 1/2" Drill Chuck, #2 Morse Taper Arbor, and Jaw Tightening Key [Installation]: This 3-Jaw Chuck will mount into the headstock or tailstock of any lathe that accepts #2MT accessories [Application]: Great for holding drill bits, small turnings, dowels, pen mandrel shafts, and much more tightens with a Chuck key for excellent grip Removes easily with knock out bar