Steelman Angle Polisher has a wheel size of 7", with a spindle thread of 5/8"-11 and a free speed of 2,500 RPM. This air-powered polisher features hardened and ground spiral bevel gears for low vibration and longevity, with a powerful 1 HP motor and a handle that can be mounted on either side. 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 4.2 CFM, measuring 16" in overall length.