1、Pencil Appearance: This pneumatic die grinder features a pencil style that provides control and maneuverability when grinding and polishing surfaces. 2、One Hand Operating: This pneumatic pencil die grinder is small, lightweight and pen shaped for easy one handed use, bringing more convenience to your work. 3、Efficiency Enhancement: Our pneumatic pencil grinder set as a whole is easy to carry around and with a no load speed of 39,000RPM, it can effectively enhance your efficiency. 4、Nylon and Zinc Alloy Material: The pneumatic pencil grinder set is made of zinc alloy and nylon material with excellent craftsmanship, wear and corrosion resistance, stable performance, and not easy to rust. 5、Application Scenarios: This grinder can be for chamfering, grinding, engraving, and internal machining of various metals. Can also be to grind and polish plastic, stone, wood, etc.