Angle Grinder, Wheel Diameter 9 in, Horsepower 3.7 hp, For Wheel Type Type 27, Max. Speed 6,500 RPM, Air Inlet 1/2 in NPT Female, Air Inlet Connection Size 1/2 in, Air Inlet Gender Female, Air Inlet Type NPT, Lever Type Safety Lever, Spindle Thread Size 5/8 In.-11, Reach Extended Reach, Duty Heavy Duty, Variable Speed Yes