Cut-Off Tool Wheel Diameter 4 in Duty Rating Heavy Duty Horsepower 1 hp Max Speed 18 000 RPM Air Inlet 3/8 in NPT Male Air Inlet Connection Size 3/8 in Air Inlet Gender Male Air Inlet Type NPT Exhaust Location Rear Cut-Off Wheel Orientation Perpendicular Reach Extended Reach Kit Contents (1) Bare Tool Speed Control Safety Lock Lever Lever Type Safety Lock Arbor Hole Size 3/8 in Spindle Diameter 3/8 in Power Source Air Powered Air Pressure 90 psi