Snap On Mg725 1/2" Drive Super Duty Impact Wrench Impact Wrench, Air, Heavy Duty, Magnesium Housing, Standard Anvil, 1/2" Drive Unit delivers an outstanding 1,190 ft. lb. (1,613 Nm) of Bolt Break Away Torque! 810 ft. lb. (1,094 Nm) of Recommended Working Torque One piece precision machined magnesium housing yields an extremely durable lightweight, balanced uni 8 vane rotor provides faster motor start up and greater performance with more torque.