Features Premium Drill Chuck: The drill chuck can hold the drill bit tightly, not easy to loose, durable and sturdy in use; It is quite suitable for long time work and has a long service life; Special Design: This keyless chuck has self-tighten design, which makes the chuck more reliable when clamping the tool Ingenuity design:Instantly convert impact driver to hold non-quick change drill & driver bits; Keyless chuck finger-tightens for easy bit changes; Greater clamping force, effectively preventing drill bits loose off, more reliable. Great vaule for money:Large range of clamp size which range from 2~13mm,suitable for many kinds of drill bit; Keyless and self-tighten type design is more in accordance with human engineering. Impeccable practicability:Durable and has long service life,suitable for long time work; Easy to install and disassemble,more convenient and labor-saving; Large range of clamp size which range from 2~13mm,suitable for many kinds of drill bit. Features: 1. 100% brand new and high quality. 2. Provides a drill chuck adaptor to connect the drill chuck and impact wrench firmly.   3. High precision threads ensure tight and stable connecting. 4. Fine and strict workmanship ensures its long service life. 5. Mainly used for impact wrench conversion. Specifications: Thread Mount: 1/2"-20UNF Chuck Adaptor Thread: 1/2" Clamping Range: 2-13mm/0.08-0.51"  Size: Shown as pictures Package Weight: Approx. 260g/9.2oz Notes: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow slight measurement deviation due to manual measurement. Packing list: 1 * Drill Chuck 1 * Chuck Adaptor      Package List