The 18 V LXT® Lithium-Ion brushless cordless four-speed mid-torque 1/2 in 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-lb of fastening torque and 740 ft-lb of nut-busting torque. Precise fastening control is achieved through the four 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. Makita's proprietary hammer and anvil impact mechanism are manufactured using the best raw materials with the highest quality steel and unique heat hardening process for maximum fastening and driving power. The XWT18Z features Makita's extreme protection technology (XPT™), a protective seal inside the tool. It is designed to improve a tool's operation in harsh conditions by channeling water and dust from key internal components. It is part of Makita's 18 V LXT system.