Bosch GDX18V-1800CB15 Brushless Socket Ready Impact Driver 18V with 4.0 Ah Core Compact Battery, Charger, Bir Holder, (4) Bits, Belt Clip, and Carrying Bag is half wrench, half driver, all impact. Combines a versatile two-in-one impact driver with next-gen Li-ion 21700 cell technology. The GDX18V-1800C Two-in-One 1/4 In. and 1/2 In. Bit/Socket Impact Driver delivers results, with the two-in-one bit/socket drive that offers a 1/4 In. quick-change hex shank holder with power groove for bits, and a 1/2 In. square drive for sockets. The kit features a CORE18V battery, which has next-gen Li-ion 21700 cell technology for optimal performance in a lightweight, high-power battery. The impact driver’s efficient, powerful EC Brushless cordless motor produces up to 1,800 In.-Lbs. of torque, while the Bosch hammer-and-anvil system provide maximum impact energy and up to 0-4,200 impacts per minute. The variable-speed trigger provides accurate driving speed. The driver has an LED light system to illuminate the work area.