... "(10mm),1/2"(13mm),5/8"(16mm) 2.keyless,key type drill chuck 3.light,heavy duty 4.packing:color box,blister(2 ... :And the power of the different digs AC&DC electric drill.characteristics:1. The high precision taper thread and hole.2 ... . Adopt unique thrust bearing, easy to put the key input force into larger clamping force, with strong impact resistant ...