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Differences are primarily denoted by the type of teeth the file has. A single cut denotes a single row of chisel-cut teeth. These files are used on saw teeth and metals where a good finish is required. A double cut file is used primarily on metals where rapid stock removal is necessary and a rough cut is permissible. It has two rows of chisel-cut teeth. A curved-tooth cut features teeth that are milled in an arc. This cut is used on flat surfaces of soft metals for rapid stock removal and a fairly good finish. File teeth are further divided into four groups: coarse, bastard, second and smooth. Coarse and bastard cuts are used on heavy work, while second and smooth cuts are used for finishing or more exacting work.

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