Premium Carbon Steel Materials: The needle files are made of carbon steel which has high hardness that are available in different profiles and cuts. The fine grain of the file set is deep hardened and coated for long-lasting cutting performance. Various Design Choices: The needle file set includes round, tapered, half-round, barrette, cross, knife, equalizing, wasp and three square files. Ten different designs of hand metal files increase the application ranges. Ergonomic and Comfortable Handle: The ergonomic handles of the small metal files provide a comfortable feeling when using. A stable grip helps you get the job done faster. The handle is firm and you can control it stably. Wide Application: The small hardened steel files can be used for removing, refining, reshaping and scraping projects including filing, shaping, deburring, adjusting, chamfering, smoothing and finishing metals, wood, plastic and polymer clay. They are perfect for shaping wood, metal, jewelry, mirror, glass,