In-Line Die Grinder, 1/4 in NPT Female Air Inlet, 1/4 in Collet, Heavy Duty, 25, 000 RPM, 0.7 hpMfr # 216GLFB 250 C4 Air Inlet 1 4 in NPT Female Item Die Grinder Collet 1 4 in Duty Heavy Duty Free Speed 25,000 RPM Grinder Type In Line Handle Material Alloy HP 0. 7 hp Includes Collet Wrenches Required Pressure 90 psi Throttle Lock Off Lever Variable Speed No Exhaust Front Average CFM @ 15 Second Run Time 26. 5 Bearing Type Ball Characteristics Up to 3 4 in Carbide Burrs Grinder Orientation In Line Tool Weight 1. 3 lb Features Collet Feature