Norton 24336 Japanese-Style Combination Waterstone 4000/8000 Grit, 8-Inch by 3-Inch by 1-Inch
Waterstones are synthetic stones designed to be softer than oil stones. These softer grade stones are used with water as the lubricant (versus oil) to develop fast-cutting slurry. Designed in a carefully planned and efficient sharpening sequence. You get the level of abrasiveness that you need at each stage, without wasting time trying to sharpen your knives on a grit that is too fine, too soon.