1、MULTIPLE FUNCTIONS: Round needle file is coated with industrial material, covers the full range of shaping, forming, carving, engraving and material removal.2、WIDE RANGE OF USE: Round needle file can be used for removing, refining, reshaping, and scraping projects, applicable for filing wood, stone, metal, glass, plastic, model, jewelry, etc.3、SUGGESTIONS FOR USE: When using needle file, the speed should not be too fast. For long lasting use, please use lubricant when using needle file.4、ERGONOMIC HANDLE: Rubber handle, safe and skin friendly, conform to ergonomic design, fit your hand, comfortable to grip and operate. Suitable for jewelry manufacturers, artisans, etc.5、ALLOY MATERIAL: Polishing round needle file is made of alloy material, high hardness, firm and sturdy, anti impact and wear resistant, stable and durable.