Heavy-Duty Air Impact Wrench, 1/2" Drive, 1/4" NPT Air Inlet, 7000 No Load RPMPin clutch hammer mechanism Built in regulator to prevent over torquing Low noise, low vibration Forward reverse switch and high low speed regulator Air Consumption: 12 CFM Air Inlet: 1 4" NPT Sound Level (dBA): 94 Drive: 1 2" No Load RPM: 7000 Vibration Level: Less Than 3. 1 m s Torque Range: 25 320 ft lbs. Hose Diameter: 3 8" (9. 5 mm) Bolt Capacity: 5 8" (15. 9 mm) Net Weight: 5 8" (15. 9 mm)