ENGINEER'S FILES USE It is used for flattening the work surface and removing corners. A file used when finishing by hand after machining. The size of an iron file is generally referred to by the blade length, not by the total length. Handle compatibility table HAND HAND S-CUT ROUND HALF ROUND SQUARE TRIANGULAR FILES FOR STAINLESS STEEL UNI-CUT FILES 100mm ENGINEER'S FILES FILE FOR PLASTIC FILE FOR FIVE DIFFERENT USES BRUSH FOR FILES HAND LEFT HANDED