Carbon Steel Material - The metal files are made of carbon steel which had high hardness. The fine-grained texture of the rasp file set is deeply quenched and coated for long-lasting cutting performance Comfortable Handle - Comfortable non-slip rubber handles keeps better grip and control, reduces fatigue and improves precision, making each wood file more perfect. Durable Gear Pattern - The gear teeth of the metal wood file are clear which promote the cutting efficiency. The precision metal file has clear surface grain which is durable and can use time and time again. Various Specifications - Needle file set includes flat file, pointed flat file, square file, triangle file, round file and half-round file. Six different designs of manual metal files increase the range of applications. Widely Use - This needle file set can be used for removal, refining, shaping and scraping projects. They are ideal for shaping wood, metal, jewelry, mirrors, glass, tiles, ceramics, leather and plastic.