General description The 150mm (6 in) W6 Diamond Whetstones are perfect for kitchen use and honing smaller workshop tools. They feature a large, wider diamond surface suitable for sharpening a variety of knives and edges. The whetstones are supplied in a plastic case with non-skid rubber feet, and the base of the case can be screw mounted to a bench. Technical specifications Dimensions: 150mm (6 in) Weight: 220g Diamond Grades: Extra Coarse Grade 220 (60 micron), Coarse Grade 325 (45 micron), Fine Grade 600 (25 micron), Extra Fine Grade 1200 (9 micron)