Ingersoll-Rand 211 Heavy Duty 3/8-Inch Pnuematic Impact Wrench

Features and Benefits:The most powerful 3/8\" palm-grip wrench you can get, with all the built-in advantages of the jumbo hammer mechanism, pressure-feed lubrication system, and power regulatorIt packs plenty of extra power to handle bolts up to 7/16\" for oil pan removal, exhaust system work, transmission and bench workUp to 150 ft.-lbs. torqueA sleek, in-line palm-grip designSteel hammer case protects the hammer mechanism against punishing use. Working torque range: 20-125 FT.-LB. / 27-170 Nm Maximum torque: 150 ft. -lb. / 204 Nm Blows per minute: 1,500 Free speed: 10,000 RPM Standard bolt size: 7/16\" / 11 mm Weight: 2.4 LB. / 1.09 KG. Length: 6.6\" / 168 mm Avg. air consumption: 2.5 CFM / 71 l/min Load: 11 CFM / 311 l/min Sound DBA (pressure/power): 104/117 Air inlet NPTF: 1/4\" Min. hose size: 3/8\" / 10mm (Amazon)