The GDX18V-1800B12 Bosch 18V Brushless 1 -4 and 1 -2 Two-in-One Impact Driver Kit is half driver half wrench all impact. The GDX18V-1800B12 Bosch 18V Brushless 1 -4 and 1 -2 Two-in-One 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. GDX18V-1800B12 Bosch 18V Brushless 1 -4 and 1 -2 Two-in-One 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. GDX18V-1800B12 Bosch 18V Brushless 1 -4 and 1 -2 Two-in-One Impact Driver Kit comes with one 18V 2.0 Ah SlimPack battery and a charger.