Designed especially for Asian Style knives, the Chef"s Choice 316 sharpener creates an Asian type factory edge known for its thin profile and razor sharpness. Asian chef"s recognize this as the ideal edge for all brands of Santuko and other Asian cutlery whether you are preparing elaborate dishes of sushi or sashimi or filleting the catch of the day. Stage 1: Sharpening/Honing: 100% diamond abrasives sharpen and hone the knife"s edge, creating the first facet. Diamonds make it fast and easy and will never detemper your knife. Stage 2: Stropping and polishing: Ultra fine diamonds strop and polish, creating highly polished micro facets along the super sharp edge. Precision guides, patented elastomeric springs hold knives securely against precision guides for accurate control of sharpening angles.