SDS Drill Chuck Capacity Range: 2-13mm(1/16-1/2 Inch); Mount Thread: 1/2-20UNF Keyless chuck finger-tightens for easily and quickly changing drill bits. Quick-change SDS shank for electric hammer Unique torque thrust bearing is easy to handle applied translate into greater clamping force, effectively preventing drill bits loose off, more reliable Suitable for the power of 1050W above impact drill, Multiply utility of cordless impact drivers and wrenches to do work of regular power drill Material:metal colour:Black Package Contents: 1 x metal lathe Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.