Air Disc Sander Product Type Air-Powered Disc Sander Included Pad Sizes 3 in 4 1/2 in 5 1/2 in Minimum Wheel Diameter 3 in Maximum Wheel Diameter 7 in Maximum Disc Speed 14 000 RPM Speed Settings Variable Abrasive Mount Type Hook and Loop Vacuum Type Non-Vacuum Horsepower 0.5 hp Duty Medium Grip Type Pistol Air Consumption 21 cfm Required Pressure 90 psi Air Inlet Size 1/4 in Air Inlet Type NPT Minimum Hose Size 3/8 in Spindle Thread Size 7/16 in - 20