Die Grinder, Duty Medium Duty, Horsepower 0.5 hp, Collet Size 6 mm, Grinder Orientation Straight, Air Inlet Connection Size 1/4 in, Air Inlet Gender Female, Max. Speed 20,000 RPM, Air Inlet Type NPT, Air Inlet 1/4 in NPT Female, Tool Style Straight, Kit Contents (1) Bare Tool, Includes Rotational Rear Exhaust, Safety-Lock Lever, Case Included No, Grip Style Barrel Grip, Safety Features Safety Lock Lever, Anti-Restart Technology No, Switch Location Side, Power Source Air Powered