Angle Grinder Wheel Diameter 1 1/4 in Horsepower 1 hp For Wheel Type Type 1 Max Speed 12 000 RPM Air Inlet 3/8 in NPT Female Air Inlet Connection Size 3/8 in Air Inlet Type NPT Lever Type Safety Lever Spindle Thread Size 3/8 In.-24 Duty Heavy Duty Variable Speed No