The BOSCH GDX18V-1800B12 18V EC Brushless 1/4” and 1/2” Two-in-One Bit/Socket Impact Driver Kit is half driver, half wrench, all impact. The BOSCH GDX18V-1800B12 18V EC Brushless 1/4” and 1/2” Two-in-One Bit/Socket Impact Driver Kit 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. BOSCH GDX18V-1800B12 18V EC Brushless 1/4” and 1/2” Two-in-One Bit/Socket Impact Driver Kits efficient, powerful EC Brushless 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 two-in-one bit/socket drive increases both convenience and power. Bits can stay conveniently inserted when using deep sockets, and more torque is transferred directly thru the 1/2 In. square drive anvil. There is no more torque loss through socket adapters or broken socket adapters. The driver has an LED light to illuminate the work area. BOSCH GDX18V-1800B12 18V EC Brushless 1/4” and 1/2” Two-in-One Bit/Socket Impact Driver Kit comes with one 18V 2.0 Ah SlimPack battery and a charger.