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File is triangular in cross section
It is double cut and have fairly sharp comers that are slightly set and cut
For general use by machinists
Grading of cuts according to coarseness is same as square file
Drill America DIC series Qualtech American pattern smooth cut three square files are triangular in cross section, and are double cut and have fairly sharp comers that are slightly set and cut. Files are for general use by machinists for filing internal angles more than the right angle, for clearing out square comers and filing taps and cutters. Grading of cuts according to coarseness is same as square file.