Impact Mechanism: Twin Hammer Squire Drive: 1/2" Free Speed: 7.500 R. P. M. Standard Bolt Size: 5/8"/M16 Max Torque: 814 Nm (600ft/1b) Avg Air Consumption: 113L/min(4 cfm) Avg Inlet/Air Hose: 1/4" PT/I. D. 3/8" Overall Lengh: 170mm Net Weigh: 2 kgs Sound/Vibration: 90DB/1.3M/S