Replacement drill chuck: A 1 or 2 - 20UNF, 1.5 - 13mm self - tighten keyless drill chuck made of high - quality alloy steel. It has strong clamping force, good wear resistance and stable performance. Self - tightening Ratchet Design: No chuck key needed. Ratchet sound prompts when tightening or loosening. Easy to operate and boosts work efficiency. Wide Compatibility: With 1 or 2 - 20UNF thread and 1.5 - 13mm clamping range, it fits most electric drills like for , for , etc. Adaptable Shank Compatibility: Comes with a 3 or 8Inch to 1 or 2Inch adapter for seamless use with 3 or 8Inch SDS - Plus and 1 or 4Inch hex shanks. Convenient and practical: Easily convert your rotary hammer or impact wrench or impact Screwdriver into a drill rather than spending money having multiple. Color:As Shown Material:Metal Package Contents: 1 x drill chuck adapter set 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.