Machinists File, Material Applications Iron, Mild Steel, Plastics, Wood, File Coarseness Bastard , File Style American Pattern File, File Type Machinists File, Profile Shape Warding, Face Style Double-, Edge Style Single, File Length without Tang 4 in, Thickness 7/64 in, File Width 7/16 in, Number of Edges 4, Rigidity Rigid, Taper Regular Taper, File Body Finish Natural