3/4" DR. Impact Wrench 3/4" DR. impact wrench Nickel chrome molybdenum square drive Variable speed trigger Muffled on handle exhaust Standard anvil General specification Std. Bolt Size : 1-3/16" inch / M30 Air hose : 1/2" ID Avg. Air Consumption : 113L/min 4.0 CFM Sound : 95.22DBA Vib : 4.85 m/s²