[1/2inch Keyless Drill Chuck for ]: This 1/2-20UNF, Keyless Drill Chuck Clamp Range 1.5mm To 13mm In Diameter, The chuck can hold the drill bit tightly and sturdy,not easy to loose. [Keyless and self-tighten design]: Quickly Loosen Or Tighten The Chuck By Hand There be a ratchet sound prompt from time to time, easy to change the drill bit, Save your time and energy. [Adaptable Design]: Features a 3/8inch to 1/2inch Keyless Drill Chuck Adapter, Socket Square Converter, used forwith various shanks Shank 3/8inch SDS-Plus and 1/4inch hex Shank, It is a practical drill chuck tool that can improve work efficiency. [Easy to use and install]: Carbide Tipped Jaws can lock onto the bits while minimising jaw wear, Even under , it can maintain long-lasting performance and service life. [Widely Application]: The 1/2-20UNF Connection Size keyless chuck for most of electric drills, as for , for , for , for , for , etc. Color: As shown Material: Metal Package Contents: 1 x impact drill adapter kit 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.