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