Die Grinder Duty Heavy Duty Horsepower 1 hp Collet Size 1/4 in Grinder Orientation Straight Air Inlet Connection Size 3/8 in Air Inlet Gender Female Max Speed 18 000 RPM Air Inlet Type NPT Air Inlet 3/8 in NPT Female Tool Style Straight Kit Contents (1) Bare Tool Includes Cone Wheel Adaptor Wrenches Switch Location Top Power Source Air Powered