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 Second Cut File Style Abrasive File File Type Needle file Profile Shape Half Round Face Cut Style None Edge Cut Style Safe File Length without Tang 5 1/2 in Thickness 1/16 in File Diameter 3/16 in File Width 3/16 in Number of Cut Edges 2