Die Grinder Duty Heavy Duty Horsepower 0.4 hp Collet Size 1/4 in Grinder Orientation Straight Air Inlet Connection Size 1/4 in Air Inlet Gender Female Max Speed 25 000 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 3/8 in Collet Insert Mfr No 50014 6mm Collet Insert Mfr No 50016 8mm Collet Insert Mfr No 50039 Material Application Steel