Angle Grinder Wheel Diameter 4 in Horsepower 0.7 hp For Wheel Type Type 27 Max Speed 11 000 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 Throttle Lever Spindle Thread Size 3/8 In.-24 Reach Standard Reach Duty Medium Duty Speed Ranges 10 000 to 12 000 RPM Variable Speed Yes