W8 diamond whetstones 200mm 8 in are ideal for kitchen use and for the honing of smaller workshop tools they have a large wider diamond surface for sharpening a variety of knives and edges they are supplied with a non skid hardwood case and tabs for permanent mounting are moulded into the stones base black extra coarse grade 220 60 micron blue coarse grade 325 45 micron red fine grade 600 25 micron green extra fine grade 1200 9 micron