Master Mechanic, 14, Straight, Die Grinder Kit, Ideal For Porting, Weld Breaking, Smoothing Sharp Edges, Deburring, Polishing Grinding Applications, 2500 RPM Variable Speed, 14 Collet, Sealed Ball Bearing Construction For Durability, Heavy Duty Aluminum Housing Comfort Grip, Lightweight Body, Safety Lever Prevents Accidental Starts, Rear Exhaust, 3 CFM At 90 PSI Air Consumption, Includes 10 Grinding Stones, 2 Wrenches, Nipple, 14 Collet Carrying Case