1High 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. 2Carbide Grinding Head: Rotary file is made of heat treated tungsten steel, which is high hardness, wear resistant, not easy to break, strong and durable. 3Practical 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. 4Use 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. 5Wide Application: Widely used in metal products, tool manufacturing, engineering, model engineering, wood carving, jewelry making, welding, casting, deburring, grinding, cylinder head transplanting, carving, etc.