The 18V LXT Brushless 4-Speed 1/2 inch Sq. Drive Impact Wrench w/ Detent Anvil (XWT15XVZ) provides improved fastening control and is 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 240 ft. lbs. of Max Torque and 430 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. Three forward and three reverse rotation auto-stop modes offer increased efficiency and can be set to automatically stop or slow rotation to help prevent over-tightening or over-loosening. The full-speed mode function reduces the trigger pull to reach full speed. These precision settings can be quickly adjusted on the control panel at the base of the handle. The XWT15XVZ features Makita's Extreme Protection Technology (XPT), a protective seal inside the tool. It is designed to improve a tools operation in harsh conditions by channeling water and dust from key internal components. It is part of Makitas 18V LXT System. The LXT Cordless System, the worlds largest cordless tool system powered by 18V lithium-ion slide-style batteries, takes a user from power tools to outdoor power equipment to get the job done. Makita 18V LXT Batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger. Batteries are sold separately. For improved tool performance and extended battery life, Makita created Star Protection Computer Controls. Star Protection is a communication technology that allows the Star Protection-equipped tool and battery to exchange data in real-time and monitor conditions during use to protect against overloading, over-discharging, and overheating.