1" DR. Composite Impact Wrench 1" DR. composite impact wrench Light weight durable composite housing Nickel chrome molybdenum square drive Comfortable rubber handle 6" extension anvil General specification Std. Bolt Size : 1-27/64" inch / M36 Air hose : 3/4" ID Avg. Air Consumption : 255L/min 9.0 CFM Sound : 104DBA Vib : 14.50 m/s²