Handy 12V Electric Car Impact Wrench eliminates the hassle of loosening and tightening lug nuts, even those that have been tightened by a mechanic or at the factory. With the help of electric power, you can easily tighten or loosen your lug nuts. This torque wrench has a maximum torgue of 340N/m. With 4 socket sizes, you don't have to worry about it being a perfect fit. It comes with an adaptor for connecting to either your cigar lighter or battery. The sockets themselves are specially designed to compensate for over and under tightening. And just in case, This Handy 12V Electric Car Impact Wrench comes with a replacement fuse. This torque control wrench is dark grey in color and comes in blow mold case.