The diamond riffler file set comes in a sturdy, practical plastic box which protects the tools from damage. This is ideal for keeping in the tool trolley or workbench. Diamond riffler files are used for work in hard-to-reach areas and on complex geometries. The coating length is 1" on each side of the files." The coating length is 25 mm on both sides of the files. The set contains one each of the following file shapes: crossing oval, hand, square, three square, round.