Angle Grinder, Wheel Diameter 4 in, Horsepower 1.3 hp, For Wheel Type Type 27, Max. Speed 13,500 RPM, Air Inlet 3/8 in NPT Female, Air Inlet Connection Size 3/8 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