Features: _x000D_ 1. brand and high quality. _x000D_ 2. Provides a drill chuck adaptor to connect the drill chuck and impact wrench firmly. _x000D_ 3. High precision threads ensure tight and stable connecting. _x000D_ 4. Fine and strict workmanship ensures its long service life. _x000D_ 5. Mainly used for impact wrench conversion. _x000D_ _x000D_ Specification: _x000D_ Thread Mount: 1/2"-20UNF _x000D_ Chuck Adaptor Thread: 1/2" _x000D_ Clamping Range: 2-13mm _x000D_ Size: Shown as pictures _x000D_ Package Weight: Approx. 260g/9.2oz _x000D_ _x000D_ Package list: _x000D_ 1 * Drill Chuck _x000D_ 1 * Chuck Adaptor _x000D_ _x000D_ Note: Please allow slight error due to manual measurement. Thanks for your understanding. 1 brand and high quality. 2Provides a drill chuck adaptor to connect the drill chuck and impact wrench firmly. 3High precision threads ensure tight and stable connecting. 4Fine and strict workmanship ensures its long service life. 5Mainly used for impact wrench conversion.