Optical Fiber Cleaving Tools the precision hand-held instruments can be used for scoring and cleaving all types of optical fiber The Retractable Diamond cleaver is retained in a quality metal casing with pocket clasp. Ground and polished natural diamond has a 90° included angle with a relief angle of 30°. The carbide cleaver is made from a solid carbide rod. It has two angled sides that intersect into a very sharp cutting edge of about 4mm in length. A third angle is lapped on the very tip to prevent breakage. Carbide is mounted into a non-rolling hexagon shaped anodized aluminum holder. Specifications: 54452-2 (diamond) 1.5 x 3mm (0.06 x 0.12") Overall Length, 133mm (5-1/4") 54452-4 (carbide) 2.0 x 10mm (0.08 x 0.4" Overall Length, 120mm (4-3/4")