'Air Die Grinder, Straight, Free Speed 23,000 rpm, HP 0.3 HP, Collet 1/4 In., Exhaust Rear, Variable Speed Yes, Grinder Type Straight, CFM @ Full Load 18.0, Average CFM @ 15 Second Run Time 4.50, Handle Material Composite, Min. Hose Size 3/8 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'