1. Convenient: The drill is keyless, easy to operate with one hand and multi-purpose. Keyless quick-change 3-jaw design for easy tightening and secure fixing. 2. Design: The impact wrench drill chuck is made of fine and strict workmanship to ensure long service life. Clamping range 2-13mm/0.08-0.51". Thread mounting: 1/2"-20UNF. chuck adapter thread: 1/2". 3.FUNCTION: The bit is mainly used for impact wrench modification. Universal 1/2" socket square head female adapter driver easily snaps into power tools with precision and strength. 4.Provide drill chuck adapter to connect drill chuck and impact wrench firmly. 5. Stability: High precision threads ensure a tight and stable connection, ensuring better working performance and longer service life.