Angle Grinder Wheel Diameter 3 in Horsepower 0.4 hp For Wheel Type Type 1 Max Speed 20 000 RPM Air Inlet 1/4 in NPT Female Air Inlet Connection Size 1/4 in Air Inlet Gender Female Air Inlet Type NPT Lever Type Safety Lever Spindle Thread Size 3/8 In.-24 Reach Standard Reach Duty Heavy Duty Variable Speed No