Mount: 1/2-20UNF; Capacity range: 2-13 mm / 1/16-1/2 inch; Built for tough jobs Constructed with metal for supreme durability. Applicable scope: suitable for 1050w power above hammer drill. Quick change SDS shank for electric hammer. Use on cordless drills and mains-powered drill drivers. Conveniently tighten with one hand with the exclusive one-sleeve design. Unique torque stop is easy to handle and apply resulting in superior tightening Quick change SDS shank for electric hammer, instantly converts impact driver to bit holder non-quick change Features: Unique thrust bearing, torque applied to the handle easily translates into greater gripping force. p> Multiply the utility of cordless impact wrenches and wrenches to do the work of a regular drill. Suitable for 1050W plus power impact drill. Good metal texture, comfortable jacket surface, with strong grip, easy to grip, increasing the output torque. It can convert two-hole two-slot electric hammer into a three claw collet for hand drill Features: Name: SDS metal chuck Material: metal and plastic< /p> Length of the at shank: 46mm Head diameter: 43mm Clamping range: 2-13mm Size: 122 x 42mm Weight: 335g Package includes: 1 x SDS chuck adapter NOTE: The product can NOT be used in counterclockwise!