1" DR. Impact Wrench 1" DR. impact wrench Nickel chrome molybdenum square drive Variable speed trigger Muffled on handle exhaust Standard anvil General specification Std. Bolt Size : 1-25/32" inch / M45 Air hose : 3/4" ID Avg. Air Consumption : 411L/min 14.50 CFM Sound : 101.15DBA Vib : 6.30 m/s²