Square File applications range from dimensioning keyways to maintain fit, stoning faces on router bits, touching-up edges of reamer teeth, and lapping/honing to close tolerances to produce the finest edge on precision instruments, die work and delicate tools. Features and Benefits Aluminum oxide abrasive produces a very strong, keen, long-lasting edge - perfect for an ideal blend of cut rate and finish Fine if preferred for producing sharper than average edges on woodworking tools, gouges, reamers, taps, auger bits and twist drills Using oil with sharpening stones enhance the sharpening action and minimize the clogging of the stone's surface Typical Applications Square file applications range from dimensioning keyways to maintain fit, stoning faces on router bits, touching-up edges of reamer teeth, lapping/honing to close tolerances to produce the finest edge on precision instruments, die work and delicate tools