A file is a tool used to remove fine amounts of material from a workpiece, and it is common in woodworking, metalworking and other trade and hobby tasks. Most files are hand tools made from a case-hardened steel bar with a rectangular, square, triangular or round cross-section, cut on one or more surfaces with sharp, generally parallel teeth, and most carry a narrow, pointed tang at one end to which a handle can be fitted. A rasp is a form of file with distinct, individually cut teeth used to remove larger amounts of material more coarsely. Some files are made with abrasive surfaces of natural or synthetic diamond grains or silicon carbide, letting them remove material, such as ceramic, that would dull or resist an ordinary steel file.
Facts
Introduced When (Circa)Circa 1200 to 1000 BC (earliest firmly dated evidence: bronze rasps found in Egypt). 1 OriginFiling and rasping have prehistoric roots, blending stone-tool cutting techniques with abrading using natural abrasives such as sandstone. 1 Introduced era (class) In the Other Atlases
Sources
1. File (Tool) (Wikipedia)
Wikimedia FoundationHistory section, Egypt bronze rasps sentence
Archaeologists have discovered rasps made from bronze in Egypt, dating back to the years 1200-1000 BC.
History section, opening paragraph
Early filing or rasping has prehistoric roots and grew naturally out of the blending of the twin inspirations of cutting with stone cutting tools (such as hand axes) and abrading using natural abrasives, such as well-suited types of stone (for example, sandstone).
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