Needle file, Material Applications Abrasive Material, Case-Hardened Steel, Ferrite, Glass, Graphite, Synthetic Carbon, Tungsten Carbide, Steel, Nickel-Based Superalloy, Titanium-Based Superalloys, Technical Ceramics, Tool Steel, File Coarseness Smooth , File Style Abrasive File, File Type Needle file, Profile Shape Half Round, Face Style None, Edge Style Safe, File Length without Tang 5 1/2 in, File Width 5 in, Number of Edges 2, Rigidity Rigid, Taper Blunt, Teeth per Inch 12