Features: 1.High Efficiency: Single cut rotary file is mainly used on pneumatic or electric drive tools, the speed is generally 6000?50000 rpm. Used in machinery, aviation, automobiles, ships, etc. 2.Carbide Grinding Head: Rotary file is made of heat treated tungsten steel, which is high hardness, wear resistant, not easy to break, strong and durable. 3.Practical Grinding Tool: Carbide rotary file can replace the small grinding wheel with handle in most of the work, without dust pollution and high work efficiency. 4.Use Suggestions: When using, the tool should be clamped upright, and the cutting method should be up milling to avoid reciprocating cutting and prevent debris from flying. 5.Wide Application: Widely used in metal products, tool manufacturing, engineering, model engineering, wood carving, jewelry making, welding, casting, deburring, grinding, cylinder head transplanting, carving, etc. Specification: Item Type: Rotary Burr File_x000D_ Material: Tungsten steel_x000D_ Color: Silver_x000D_ Applicable: Suitable for aviation, automobile, ship surface grinding, etc.