Editing File (tool) (section)

=== Diamond files ===
[[File:DiamondFiles.jpg|thumb|200px|A selection of diamond impregnated files]]

Instead of having teeth cut into the file's working surface, diamond files have small particles of [[Diamond#Industrial-grade diamonds|industrial diamond]] embedded in their surface (or into a softer material that is bonded to the underlying surface of the file). The use of diamonds in this manner allows the file to be used effectively against extremely hard materials, such as stone, glass or very hard metals such as hardened steel or carbide against which a standard steel file is ineffective. Diamond files are also the only type that may be used with a back-and-forth motion without damaging the file. These may also be called diamond [[lap (tool)|lap]]s, as the "teeth" are not regular projections, as in a file, but particles, usually shaped and located randomly and held in place by a softer (any other) material.
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