JAT-480,1 HP,Industrial Die Grinder R12, Duty Heavy Duty, Horsepower 1 hp, Collet Size 1/4 in, Grinder Orientation In-Line, Max. Speed 20,000 RPM, Air Inlet 1/4 in, Includes 1/4 In. Erickson Collet, Safety Features Safety Lock, Power Source Air Powered