This item Pneumatic Air Micro Die Grinder Sets,3mm Chuck Pencil Type Polishing Engraving Grinding Pneumatic Tools 58000RPM Chicago Pneumatic CP9104Q - Air Pencil Die Grinder Tool, Welder, Woodworking, Automotive Car Detailing, Stainless Steel Polisher, Heavy Duty, 1/8 Inch (3mm), 0.05 HP / 40 W - 60000 RPM