The 18V LXT Sub-Compact Brushless Impact Driver Kit (XDT18SY1B) is a fastening solution with significantly less weight. The 18V Sub-Compact Impact Driver offers the size and weight of lower voltage tools but with the performance, power, and compatibility of 18-Volt. It has an efficient brushless motor with two speed settings and dual L.E.D. lights illuminate the work area. The innovative Assist Mode (A-mode) helps eliminate "screw cam-out" and "cross threading" by driving at low speed until tightening begins and is ideal for driving longer fasteners. It delivers 1,240 in. lbs. of Max Torque. At only 5-1/4 in. and 2.6 lbs. (with a 2.0Ah battery), it is a fastening solution with superior comfort and handling. Its part of Makitas expanding 18V LXT System, the worlds largest cordless tool system powered by 18V lithium-ion slide-style batteries. Makita 18V LXT 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 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 Lithium-Ion Batteries with the star symbol on the battery indicating Star Protection inside.