Steelman Reversible Air Drill with a 1/2" chuck and spindle thread of 3/8"-24 offers a free speed of 800 RPM. This extra-heavy-duty, air-powered tool features a built-in muffler for noise reduction, a convenient forward/reverse lever, and a positive-action trigger for speed control. This product also features a 1/4" air inlet (for 3/8" hose) and runs on 90 PSI of air pressure, with an air consumption of 4 CFM, measuring 7-1/2" in overall length.