Machinists File, Material Applications Aluminum, Brass, Bronze, Steel, Tin, File Coarseness Bastard , File Style American Pattern File, File Type Machinists File, Profile Shape Triangular, Face Style Double-, Edge Style Single, File Length without Tang 6 in, Thickness 7/16 in, File Width 7/16 in, Number of Edges 3, Rigidity Rigid, Taper Taper Towards Point, Teeth per Inch 28, 34, 40, File Body Finish Natural, Container Type Box, Features Exclusive Wavy Tooth Design