Chicago Pneumatic CPTCP7732C Industrial Duty Air Impact Wrench (1/2 Square Drive Size 52 to 285 ft.-lb.) (Non-Carb Compliant) 460 ft-lbs of maximum torque in reverse Aluminum clutch housing New power setting system : 1 hand-operation behind the trigger 2 positions in reverse: max and lower torque 2 position in forward: max and low torque