• 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