Steelman Die Grinder with rear exhaust includes a 1/4" collet and offers a free speed of 22,000 RPM. This air-powered tool features a rugged, energy-efficient 0.6 HP motor, with a ball-bearing construction that provides vibration-free performance, and its rear exhaust feature directs air away from work areas. This unit includes 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 6-3/4" in overall length.