Milwaukee m12 biw38 is a high performance sub compact impact wrench that measures 165mm in length making it ideal for working within confined spaces has a heavy duty full metal gearbox and gears for superior durability and maximum torque 38in square drive for use with universal sockets the optimised handle provides improved grip and better control on board fuel gauge and led light give added user convenience and illumination in low lit working conditions redlithium ion battery pack delivers twi