The Shapton Professional #12,000 waterstone is a super-fine waterstone that gives an excellent edge and will polish hard steels, especially the high carbon edges of Japanese tools and knives. It is capable of bringing up a mirror finsih and will leave all edges wonderfully sharp.
As with the rest of the Shapton Professional range, the #12,000 is manufactured to maintain flatness for a relatively long time. For best results, we recommend regular light flattening of the stone with either a diamond plate or sandpaper on glass.
The extra step to finish on the #12,000 over either the #5,000 or #8,000 Professional stones, though a small investment in time, will yield phenomenaly sharp bevels. Sharpeners who have carried good geometry through the lower grits will be rewarded with excellent edges on any tool or knife.