Air Pencil Grinder, General, Free Speed 60, 000 rpm, Average CFM @ 15 Second Run Time 1.8, 7.0 CFM @ Full Load, 0.05 HP, Rear Exhaust Type, Twist Throttle, Variable Speed Yes, Min. Hose Size 3/8 In., Whip Hose I.D. 1/4 In., Hose Length 60 In., Air Inlet 1/4 In. NPT, Overall Length 5-1/5 In., Collet Capacity 1/8 In., Required Pressure 90 psi, Ball Bearings, Composite Housing Material, Tool Weight 0.5 lb. Pencil Grinders1/8" collet