Hand files are tools that dentists use to clean and shape the root canal during treatment through the sense of touch. This touch allows the dentist to feel a change in resistance or angle, which can help determine curvature or changes in anatomy. In general, the use of a hand file is in shaping and cleaning the root canal from organic debris and bacteria. This tool, with colored and special silicone handles for each size, allows the dentist to recognize the size of the tool while working.