The Makita 18V LXT? Lithium-Ion Brushless 3-Speed ?? Impact Wrench (XWT11Z, tool only) combines extended run time and speed control for unmatched fastening performance. The XWT11Z is powered by a Makita brushless motor for longer run time, increased power and speed, and longer tool life. Three speeds with reverse rotation auto-stop mode stops rotation in two seconds when fastener is adequately loosened, making the XWT11Z ideal for automotive, installation, and fabrication trades. It?s part of Makita?s expanding 18V Lithium-Ion series, the world?s largest cordless tool line-up powered by an 18V Lithium-Ion slide-style battery. Makita 18V Lithium-Ion batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger.For improved tool performance and extended battery life, Makita created Star Protection Computer Controls?. Star Protection is 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. For increased versatility, the tool can also be powered by Makita 18V LXT? and Compact Lithium-Ion batteries with the star symbol on the battery indicating Star Protection inside.