1/4" 90 Degree High Speed Air Angle Die Grinder + 6 Polishing Stones 22000RPM Grinding Die Cast Aluminum Body With Ball Bearing Motor Throttle For Precision Control - 2 Chuck Wrenches Included Free Speed: 22,000 RPM / 6 Shape Grinder Stone Included Working Air Pressure: 90 PSI - Avg. Air Consumption: 3 CFM Collect Size: 1/4" & 1/8" / Air Hose ID: 3/8" / Air Inlet: 1/4"