Capacity Range - 3-16mm(1/8-5/8 Inch); Mount Thread: 1/2-20UNF You will get The SDS-Plus bits, 1/4inch hex shank lock key, 1/2 inch socket square female adapter, hex dandle converter and 2pcs 16mm key wrenches; This Converter Conversion Tool can easy to transform power impact wrench to a drill or grinder in seconds Class 3-Jaw Design - Class 3-jaw design allows you to effortlessly hold round-shank drill bits from 3mm to 16mm securely Durability - The chuck is high precision threaded and tapered tightly with rust-resistant Cr-coated body and sleeve electrophoretic enameling coating. All the extensions are applied with rust-proof finishing for extended service life Note - The product can NOT be used counterclockwise. It must be transferred hammer drill stalls when use the hammer chuck, other stalls will lead chuck broken Colour:As Shown Material:Metal Package Contents: 1set x drill chuck adapter Only the above package content, other products are not included. Note: Light reflection 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.