Steelman Twin Hammer Impact Wrench with a 1/2" square drive offers a maximum torque of 400 ft./lb. with a free speed of 7,000 RPM. This heavy-duty air wrench features a variable speed trigger for optimum control, and the unit's steel hammer case provides maximum protection. This also features a 2" extended anvil, handle exhaust, a protective rubber boot, and a 1/4" air inlet (for 3/8" hose), offering an air consumption of 4 CFM and measuring 6-3/4" in overall length.