The AIRCAT 1431 1/2-Inch Impact Wrench is designed for passenger car tires and light trucks. The hammer mechanism and anvil are made from triple-heat treated Ni-Cr-Mo alloy steel for reliability and durability. The 1431 produces 800 ft-lbs of maximum torque at 9000 RPM creating 1,600 impacts per minute for removal of the toughest lug nuts.