Used for finishing on material where the hardness makes conventional files ineffective.Used by die and mould makers and for special manufacturing applications on materials such as hardened steel, ceramics, glass, graphite.Shapes match the corresponding conventional needle files.2-306 - two convex surfaces of different radii, tapering to a point.2-307 - round, tapering to a point.2-308 - conical, edges and surfaces taper to a point, uncut back.Files are covered with diamond grit (D 126) and are supplied in individual plastic pouches.Single pack