Die Grinder, Duty Heavy Duty, Horsepower 0.4 hp, Collet Size 1/8 in; 3mm, Grinder Orientation Straight, Air Inlet Connection Size 1/4 in, Air Inlet Gender Female, Max. Speed 30,000 RPM, Air Inlet Type NPT, Air Inlet 1/4 in NPT Female, Tool Style Straight, Kit Contents (1) Bare Tool, Includes 1/8 in Collet Insert Mfr. No. 01495, 3mm Collet Insert Mfr. No. 01496, Material Application Carbon Fiber, Composites, Fiberglass, Metal, Safety Stop Mechanisms Safety-Lock Throttle Lever