The Makita 18V LXT Lithium-Ion Brushless cordless quick-shift mode 3-speed impact driver (model XDT14Z, tool only) is a best-in-class fastening solution for users who want more torque, longer run-time, and precision fastening features. The XDT14Z delivers all of the above in a compact size with a superior power-to-weight ratio. The XDT14Z combines a full 1,550 in. lbs. Of fastening torque with category-leading precision features. Quick-shift mode is an automatic electronic controller that down shifts and reduces rotation and impact speed prior to driving the screw into place. It is engineered to minimize screw thread stripping, screw breakage and damage to work. For faster tightening of self-drilling screws, use the tightening mode (T-mode) and avoid damage to the screw or work piece. These precision settings, combined with 3-speed power settings, give users more control for a wide range of fastening tasks from cabinet screws and deck screws to lag bolts, and much more. It is only 4-5/8 In. long and ideal for work in tight spaces. Its part of Makita's expanding 18V Lithium-Ion series, the worlds largest cordless tool line-up powered by 18V Lithium-Ion slide-style batteries. 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.