Air Die Grinder Straight Free Speed 34 000 rpm HP 0.3 HP Collet 1/4 In. Exhaust Front Variable Speed Yes Grinder Type Straight CFM @ Full Load 16.0 Average CFM @ 15 Second Run Time 4.00 Handle Material Composite Min Hose Size 1/4 In. Overall Length 6 In. Required Pressure 90 psi Air Inlet 1/4 in NPT Bearing Type Double Shielded Ball Throttle Lever Characteristics 300 Series Collet Includes Collet Wrenches