For work where the standard flat file, ref.1-100, is too wide or too thick, e.g. for filing fine grooves For making dies and punches, etc. Shape: parallel edges and faces Type of cut: 1 = bastard, 2 = semi-soft, 3 = soft Cross-cut on faces, one edge not cut, other single cut on edges Industry pack without handle Easier access to places where a standard file is too wide The pillar file is a thinner model of the flat file.