Torque down or loosen fasteners with an impact wrench from United Rentals. This impact wrench is designed for heavy-duty industrial applications. Save yourself the strain of doing it by hand: Impact wrenches are heavy-duty air tools that do the work for you. This wrench has torque control for variable speed and torque. This 1-1/2" drive impact wrench has an ergonomic pistol grip and a maximum torque range of 375-5,200 ft.-lbs.