Features Zinc Alloy: Made of zinc alloy, this pneumatic pencil grinder is durable, wear-resistant and is a professional and practical model tool. High-speed rotation improves work efficiency and provides better work. ONE HAND USE This pneumatic pencil grinder is small, light and pen shaped for easy one-handed operation, bringing more convenience to your work. Application scenarios: can be used for cleaning, chamfering, grinding, etching and internal machining of various metals. Can also be used for cutting, grinding and polishing plastic, stone, wood, etc. Widely used in iron products, woodworking, outdoor processing of tire industry, shipbuilding industry, etc. Pencil-Type Shaft This pneumatic pencil grinder features a pencil-style shaft that provides control and maneuverability when cutting, grinding and polishing surfaces. HIGH SPEED & PRESSURE This pneumatic pencil grinder works with an air compressor, sliding on the outside at a free air speed of 65,000 rpm and working air pressure of 90 psi. Specification: Item Type: Pneumatic Pencil Grinder Kit Material: Nylon, Zinc Alloy Collar size: 1/8 inch Working pressure: 90psi Input: 1/4in Package list: 1 x Pneumatic Pencil Grinder 1 x Oil Bottle 2 x wrench. 1 x Interface 1 x collar. 10 x grinding head. 1 x English manual. Small note: Operating room, please pay attention to turn on the silver switch, keep the switch slow and accelerate gradually to keep the motor always in working condition. 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