With keyless design-drill chuck, easily lock bit or tools by hands,save your time and energy. The Quick Release Drill Chuck adopt a classic 3-jaw design, can easily hold round-shank drill bits from 0.8mm to 10mm securely. It is also a ideal drill conversion tool, allows quickly lock and release, which can convert cordless power screwdriver into a grinder or drill easily. The SDS-Plus bits, 1/4inch hex shank lock key, 1/2 inch socket square female adapter can easy to transform power impact wrench to a drill or grinder in seconds. With high precision threaded and tapered tightly with rustresistant crcoated body and sleeve electrophoretic enameling coating,it is very widely used for heavy duty drill work as to hard material such as drill hole on wall or stone. 0.8-10mm(0.03inch-0.4inch); Mount Thread: 3/8-24UNF Color: As shown Material: Metal Package Contents: 1set x 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.