The 18V LXT Lithium-Ion Brushless Cordless 4-Speed Mid-Torque 1/2″ Sq. Drive Impact Wrench with Detent Anvil, Tool Only (XWT18Z) provides improved fastening control, ideal for automotive, installation, and fabrication trades. The impact wrench combines extended run time and speed control for unmatched fastening performance. It is powered by a Makita-built brushless motor for longer run time. The brushless motor delivers 520 ft.lbs. of Fastening Torque and 740 ft.lbs. of Nut-Busting Torque. Precise fastening control is achieved through the 4-speed power selection switch, which accounts for a wide range of applications. Additional precision features include three forward and three reverse rotation auto-stop modes, and a full-speed mode function that reduces the trigger pull to reach full speed.