The DTW1001Z is a high torque Cordless Impact Wrench powered by 18V Li-ion battery (not included) to deliver up to 1,800 rpm and 2,200 ipm. The brushless motor eliminates carbon brushes, enabling the motor to run cooler and more efficiently for a longer life and is electronically controlled to optimise battery energy use up to 50 per cent longer run time per charge. The DTW1001Z is a socket wrench power tool designed to deliver high torque output with minimal exertion by the user, by storing energy in a rotating mass, then delivering it suddenly to the output shaft.