M7 Impact Wrench, Ez Grease Anvil, Magnesium Composite, Pistol Style, 1/2" Dr, 1,200 Ft/Lb M7-NC4255QHMagnesium alloy & composite material construction. Extremely powerful & very lightweight. Twin hammer type clutch. Patented EZ Grease Anvil SPECIFICATIONS Square Drive: 1 2" Bolt Capacity: 1" (25mm) Torque Range: 200 800 ft lb 271 1085 Nm Max Torque at 5 seconds: 1200 ft lb 1627 Nm Free Speed: 8500 RPM Air Requirement: 4. 8 CFM 90 PSI 1 4" Inlet Overall Length: 179mm Net Weight: 1. 7kg Sound Pressure: 85dBA Vibration Level: 4. 7m s