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Wikipedia definition
1. File (tool)A file is a metalworking, woodworking and plastic working tool used to cut fine amounts of material from a workpiece. It most commonly refers to the hand tool style, which takes the form of a steel bar with a case hardened surface and a series of sharp, parallel teeth. Most files have a narrow, pointed tang at one end to which a handle can be fitted. A similar tool is the rasp. This is an older form, with simpler teeth.
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