Machinists File, Material Applications Iron, Mild Steel, Plastics, Wood, File Coarseness Second , File Style American Pattern File, File Type Machinists File, Profile Shape Round, Face Style Single-, Edge Style Safe, File Length without Tang 8 in, Thickness 9/32 in, File Diameter 5/16 in, Number of Edges 4, Rigidity Rigid, Taper Tapered Slightly Towards Point, Teeth per Inch 30, File Body Finish Natural