Features： 1、High Speed and Pressure: This pneumatic pencil die grinder works with an air compressor, sliding across the exterior at 65,000rpm free air speed and 90psi working air pressure. 2、One Hand Use: This pneumatic pencil die grinder is small, lightweight and pen shaped for easy one handed use, bringing more convenience to your work. 3、Zinc Alloy: Made of zinc alloy, this pneumatic pencil die grinder is durable, wear resistant and a professional and practical model making tool. High speed rotation improves work efficiency and provides better work. 4、Pencil Type Shaft: This pneumatic pencil die grinder features a pencil style shaft that provides control and maneuverability when cutting, grinding and polishing surfaces. 5、Application Scenarios: Can be used for cleaning, chamfering, grinding, engraving, and internal machining of various metals. Can also be used to cut, grind and polish plastic, stone, wood, etc. Widely used in iron products, woodworking, tire industry exterior treatment, shipbuilding industry, etc. Specification： Item Type: Pneumatic Pencil Die Grinder Kit Material: Nylon, Zinc alloy Collet Size: 1/8in Working Pressure: 90psi Inlet: 1/4in Package List： 1 x Pneumatic Pencil Die Grinder 1 x Oil Bottle 2 x Wrench 1 x Interface 1 x Collet 10 x Grinding Head 1 x English Manual