Machinists File, Material Applications Iron, Mild Steel, Plastics, Wood, File Coarseness Bastard , File Style American Pattern File, File Type Machinists File, Profile Shape Square, Face Style Double-, Edge Style Double, File Length without Tang 12 in, Thickness 9/32 in, File Width 1/2 in, Number of Edges 4, Rigidity Rigid, Taper Tapered Slightly Towards Point, File Body Finish Natural