Air Pencil Grinder Heavy Duty Horsepower 0.1 hp Collet Size 1/8 in Exhaust Location Rear Max Speed 56 000 RPM Air Inlet 1/8 in NPT Air Inlet Connection Size 1/4 in Air Inlet Gender Female Air Inlet Type NPT Whip Hose I.D. 1/4 in Vibration Level 3.2 m/sq sec Throttle Type Knob