Die Grinder, Duty Heavy Duty, Horsepower 0.7 hp, Collet Size 1/4 in; 6mm, Grinder Orientation Straight, Air Inlet Connection Size 1/4 in, Air Inlet Gender Female, Max. Speed 3,200 RPM, Air Inlet Type NPT, Air Inlet 1/4 in NPT Female, Tool Style Straight, Kit Contents (1) Bare Tool, Includes 1/4 in Collet insert Mfr. No. 50013, 6mm Collet insert Mfr. No. 50016, Material Application Carbon Fiber, Composites, Fiberglass, Metal, Safety Stop Mechanisms Safety-Lock Throttle Lever