1/2" DR. Impact Wrench 1/2" DR. impact wrench Aluminum alloy housing Nickel chrome molybdenum square driver Variable speed trigger Muffled on handle exhaust 6" extension anvil General specification Std. Bolt Size : 3/4" inch / M19 Air hose : 3/8" ID Air pressure : 90 PSI (6.2 bar) Avg. Air Consumption : 125L/min 4.4 CFM Sound : 96.192DBA Vib : 6.84 m/s²