Diamond that sharpens steel: millions of extremely thin diamond grains are placed in the centre of a very hard steel without stains, a new Dinitec stratification was used by F. Dick; this instrument sharpens all types of steel in a special way. The hard surface guarantees a high grinding in sharpening and also a long duration of knives or other butcher instruments in restoring the edge in time. Sharpener length 14 cm. Perfect to sharpen knives having a rather short blade.