Kramer by Zwilling JA Henckels Bob Kramer Sharpening Stone 34999-043 ， #10，000 grit<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Made from synthetic ceramic whetstone</li><li>Grit #10000- is for very fine finishing， mirror polish</li><li>Efficiently sharpens knives to desired sharpness</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31e68T5ATCL.jpg" noproxy>