Steelman Die Grinder with rear exhaust includes a 1/8" collet and offers a free speed of 54,000 RPM. This micro, air-powered tool features a twist throttle and precision ball bearings, making it the perfect tool for cleaning, polishing, dies, porting, polishing engines, and deburring castings, and its rear exhaust is piped away. This unit has a 1/8" air inlet (for 5mm hose) and runs on 90 PSI of air pressure, with an air consumption of 4 CFM, measuring 5-1/4" in overall length.