Features Safe Connection: 1/2-20UNF, capacity range: 2-13mm, easy to snap into power tools for a strong and reliable connection, ensuring efficient and precise drilling. Adapter Conversion: Comes with 1/2" square female socket adapter to easily convert your electric impact wrench into a drill bit. Level 3 Jaws: Level 3 jaws allow you to easily and securely hold round shank drill bits from 2mm to 13mm. Notes: It cannot be used counterclockwise and is not suitable for impact drives or applications involving high torque loads. Humanized Design: Keyless chuck design and tool-free attachment allow you to quickly and easily manually lock and release, high-precision threads ensure a tight and stable connection, preventing any shaking or sliding during use. Features: Safe Connection: 1/2-20UNF, capacity range: 2-13mm, easy to snap into power tools for a strong and reliable connection, ensuring efficient and precise drilling. Adapter Conversion: Comes with 1/2" square female socket adapter to easily convert your electric impact wrench into a drill bit. Humanized Design: Keyless chuck design and tool-free attachment allow you to quickly and easily manually lock and release, high-precision threads ensure a tight and stable connection, preventing any shaking or sliding during use. Level 3 Jaws: Level 3 jaws allow you to easily and securely hold round shank drill bits from 2mm to 13mm. Notes: It cannot be used counterclockwise and is not suitable for impact drives or applications involving high torque loads. 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: 1.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.  2.Please allow slight measurement deviation due to manual measurement. Packing list: 1 * Drill Chuck 1 * Chuck Adaptor   Package List