Files
Flat Files
Flat files are used by machinists, machinery builders, ship and engine builders, repair men and others who require rapid removal of metal. They are rectangular in cross section and taper slightly in width towards the point. They are double-cut on both sides and single-cut on both edges.
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Half Round Files
Rounded on one side and flat on the other, they are used on concave and convex as well as flat surfaces. The backs on all half round bastard files are double-cut. The backs of all half round second cut files longer than 6 inches are double-cut, the 4 and 6 inch files are single-cut. The backs of all half round smooth files are single-cut. The flat sides of all flat round files are double-cut.
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Knife Files
Knife files are used principally by tool and die makers on work having acute angles. All sides are double-cut and the sharp edges are single-cut. Knife files are supplied with uncut backs.
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Mill Files
Mill files are used for sharpening mill or circular saws as well as for draw-filing and finishing metals. All sizes are tapered slightly in width and have two square edges. They are single-cut on the sides and the edges.
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Carded Mill Files without Handles
Files are the same style as above, but individually packaged on a card.
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