Air Die Grinder Straight Free Speed 18 000 rpm HP 0.7 HP Collet 1/4 In. Exhaust Rear Variable Speed No Grinder Type Straight CFM @ Full Load 34.0 Average CFM @ 15 Second Run Time 8.50 Handle Material Composite Min Hose Size 3/8 In. Overall Length 8-1/8 In. Required Pressure 90 psi Air Inlet 1/4 in NPT Throttle Lever Characteristics Gearless