1" DR. Impact Wrench 1" DR. impact wrench Aluminum alloy housing Nickel chrome molybdenum square drive Variable speed trigger Muffled on handle exhaust Standard anvil General specification Std. Bolt Size : 1-1/4" inch / M36 Overall Length : 14-19/32" inch (371 mm) Air hose : 3/4" ID Avg. Air Consumption : 255L/min 9.0 CFM Sound : 101.17DBA Vib : 10.77m/s²