Bosch 12-Volt Max 1/4-in; 1/2-in Variable Speed Cordless Impact Driver (2-Batteries Included)Most compact impact driver in its class for outstanding practicality Stout, short 5. 4 In. head length to reach tight work spaces Light weight, at just over two pounds for all day jobs Max torque of 930 In. Lbs. can handle most jobs on a jobsite No load 3,100 BPM delivers professional driving muscle Powerful hammer and anvil system for high torque fasteners Spring loaded impact mechanism reduces user fatigue 1 4 In. hex drive with quick release for