1/2" electric impact wrench complete with 17, 19, 21 and 22 mm CrV steel sockets. Thanks to the LCD display, the crewdriver allows you to adjust the tightening torque between 150 and 350 Nm, while unscrewing the torque is 500 Nm. It is electrically powered, so it does not need a compressor. The crewdriver is perfect for use in mechanical workshops and domestic garages.