Bosch Impact Driver Kit, Battery Included, 18 V, 1/4, 1/2 in Drive, 2 Ah Battery, Hex, Square Drive, Impacts per Minute: 4200 ipm, 0 to 3400 rpm Speed, (1) GDX18V-1800 18 V EC Brushless Freak 1/4 in and 1/2 in Two-In-One Bit/Socket Impact Driver, (1) 18 V Lithium-Ion 2.0 Ah SlimPack Battery, (1) 18 V Charger, (1) 4X Bit Holder, (4) Bits, (1) Belt Clip and (1) Carrying Bag Included, Brushless Motor, Trigger Control, Lithium-Ion BatteryHalf driver, half wrench has a 1/4 in quick-change hex shank and a 1/2 in square drive, for using either bits or socketsPowerful EC brushless motor delivers a max of 1800 in-lb of torque and up to 4200 ipm for professional powerImpact driver eliminates using socket adapters, while transmitting more torque directly through the 1/2 in square drive anvilHammer and anvil system designed for maximum impact energySingle focused LED light illuminates dark work areasElectronic cell and motor protection helps protect the tool and battery from overloading conditionsOne 18 V 2.0 Ah slimpack battery and charger provide outstanding runtimeBelt clip allows tool to hang conveniently off belt or other objects while on the job