The Martins Industries Impulse 1" Classic Impact Wrench, No. MX-C2, is designed for truck and heavy vehicle wheel removal and mounting. Equipped with a pinless hammer design, the impact wrench delivers a maximum working torque of 1,328 ft-lbs with a maximum speed of up to 4,000 rpm. The three-speed control mechanism easily switches between clockwise and counter-clockwise rotational torque direction to suit the lug nut fastening needs.