Capacity Range - 1.5-13mm(1/16-1/2 Inch); Mount Thread: 1/2-20UNF Versatile Adapter - Ideal Drill Conversion Tool - The SDS-Plus bits, 1/4Inch hex shank lock key, 1/2 inch socket square female adapter and hex dandle converter can easy to transform power impact wrench to a drill or grinder in seconds. Keyless Drill Chuck - Quickly loosen or tighten the chuck by hand for easy bit changes without fumbling for a chuck key. Class 3-Jaw Design - Class 3-jaw design allows you to effortlessly hold round-shank drill bits from 1.5mm to 13mm securely. Durable&Efficiently - With high precision threaded and tapered tightly with rust-resistant cr-coated body and sleeve electrophoretic enameling coating,it is very durable widely used for heavy duty drill work as to hard material such as drill hole on wall or stone. Colour:As Shown Material:Metal Package Contents: 1set * drill chuck for impact driver 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.