The SB-3UK is a battery operated impact wrench especially designed to torque down the shear bolts for electrical connection use. The tool features a unique shape to reduce its legth for easy access to tight space. It develops 196 Nm or 143ftlbs of torque and features variable speed to 2,200 rpm. As it was designed for electrical work, there is no opening for air circulation. Continuous use will overheat and damage the tool. Rest the tool after 20 bolts are sheared. Supplied complete with carry case. Batteries and chargers supplied seperately.