The Ultra Sharp 2200 Grit is is an extremely fast honing diamond sharpening stone yet leaves a razor sharp edge on all knives and tools. The Ultra Sharp 2200 Grit will easily sharpen high carbon, stainless steel, and ceramic knives! he Ultra Sharp 2200 is made of micronized monocrystalline diamonds electroplated onto a solid steel plate. It is considered to be a finishing stone and provides am excellant finished edge for many sharpening applications. Like the lower grit Ultra Sharp stones, it removes steel at a very fast rate. We have never seen another stone remove steel as quickly yet still leave such sharp edge. Weve tested every diamond sharpening stone made and the Ultra Sharp performs as well or better than any of them.