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