Die Grinder, Duty Heavy Duty, Horsepower 1 hp, Collet Size 1/4 in, 6mm, Grinder Orientation Straight, Air Inlet Connection Size 3/8 in, Air Inlet Gender Female, Max. Speed 25,000 RPM, Air Inlet Type NPT, Air Inlet 3/8 in NPT Female, Tool Style Straight, Kit Contents (1) Bare Tool, Includes 1/4 in Collet, 6mm Collet, Piped Exhaust, Wrenches, Grip Style Barrel Grip, Safety Features Locking Throttle Lever, Switch Location Top, Power Source Air Powered