Versatile two-in-one impact driver and impact wrench design – features a versatile hex shank with power Groove and a socket drive Powerful EC Brushless motor – delivers a max of 1, 800 in.-Lbs. Of torque and up to 4, 200 IPM for professional power Half driver, half wrench – features a 1/4 in. Quick-change hex shank with power Groove and a 1/2 in. Square drive, for using either bits or sockets Hammer-and-anvil system – designed for maximum impact energy Electronic cell and motor protection – helps protect the tool and battery from overloading conditions