The Makita 18V LXT® Lithium-Ion Brushless Cordless Quick-Shift Mode™ 3-Speed Impact Driver (model XDT14Z, tool only, batteries and charger sold separately) 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™ uses the brushless motor’s electronic controls to find the best balance of speed and torque for each application for more efficient fastening. Another precision feature is Tightening Mode (T-mode), which downshifts and reduces rotation and impact speed prior to driving the screw into place, and is engineered to minimize screw thread stripping, screw breakage and damage to work. These precision features, 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" long and ideal for work in tight spaces. It’s part of Makita’s expanding 18V Lithium-Ion system, the world’s largest cordless tool system 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.