Air Impact Wrench, Industrial Duty, Standard Anvil, Square Drive Size 3/8 In., Max. Bolt Capacity 1/2 In., Torque Range 50 to 300 ft.-lb., Max. Torque 415 ft.-lb., Average CFM @ 15 Second Run Time 5.0, CFM @ Full Load 20.0, Free Speed 9400 rpmRing Retainer Type, Pistol Grip Style, Required Pressure 90 psi, Air Inlet 1/4 In. NPT, Min. Hose Size 3/8 In., Overall Length 6-2/5 In., Composite Handle Material, Handle Type Pistol Grip, Magnesium Housing Material, Tool Weight 2.78 lb.