Trauss diamond file needle, total length 140 mm (diamond 40 mm), triangular, grit 91 mm

strauss needle diamond files, 140 mm in length with a 70 mm diamond-coated section, are the most popular size for precision finishing and grinding of hard materials. ideal for tungsten carbide, steels above 40 hrc, technical ceramics, glass and composites. available in flat, square, round, triangular and half-round profiles, they feature a 3.0 mm cylindrical tang suitable for standard handles. essential tools for workshops, toolrooms and mold maintenance departments.