3/8" Drive Super Duty Magnesium Impact Wrench Florida Pneumatics 3/8" Super Duty Magnesium Impact Wrench includes both a magnesium hammer case and low weight composite housing with a total weight of only 2.6 lbs. creating less operator fatigue. 275 ft./lbs. of torque. Other features include a new modern design with low vibration, twin hammer construction, and a combined reverse power management system plus a two year warranty.