Makita has a legacy of innovation in the cordless impact driver category, and the 18V LXT® Brushless 4-Speed Impact Driver (XDT20) sets new standards. The XDT20 offers 4-speed power selections (0-1,100/ 0-2,100/ 0-3,200/ 0-3,600 RPM & 0-1,100/ 0-2,600/ 0-3,600/ 0-3,800 IPM) which provides precise fastening control for a wide range of applications. The Impact Driver features Assist Mode (A-mode) which helps eliminate ""screw cam-out"" and ""cross threading"" by driving at low speed until tightening begins. It also features two Tightening Modes (T-mode) for faster tightening of self-drilling screws in thick or thin gauge metal that helps prevent damage to the screw or workpiece. The XDT20 delivers industry-leading performance in a compact and ergonomic design. The impact driver combines power, speed, and precision. A one-touch 4-speed power selector button is positioned on the rear of the impact driver, which enables one-handed speed changes. It includes reverse rotation auto-stop mode which stops rotation and impact when the fastener is loosened adequately to help prevent over-loosening and dropped fasteners. It's part of Makita's expanding 18V LXT® system, the world's largest cordless tool system powered by 18V Lithium-Ion batteries. 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. 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. 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.