Historically, diamonds are the most sought-after gemstone and the hardest substance known to man. And with the extraordinary durability and performance of tool-quality diamonds, the Lansky Diamond Knife-Sharpening System provides the ultimate in sharpening technology. The unique sharpening capability of the Lansky Diamond Sharpening System is especially valuable for today"s advanced ultra-hard blade steel. The Lansky Sharpening System comes with four sharpening hones of different coarseness levels. The extra-course diamond, the course diamond, the medium diamond, and fine diamond hones are included in this Lansky Diamond Knife-Sharpening System. With these options, you can use the Lansky Diamond Sharpening System to sharpen any kitchen, hobby, or garden knife. Easy to use, the controlled-angle sharpening system comes with extra-long knife clamp screws. Simply secure the knife, choose your preferred angle, and you"ll receive a sharp edge every time. The Lansky Diamond Knife-Sharpening System comes with complete, easy-to-follow instructions to help you use the kit effectively. Kit Includes: * Extra-coarse diamond hone * Coarse diamond hone * Medium diamond hone * Fine diamond hone * Patented, precision-engineered, multi-angle, flip-over knife clamp * Sharpening hones on color-coded, finger-grooved safety holders * One guide rod for each honing stone * Specially formulated honing oil * Extra-long knife clamp screws * Custom-molded storage/carrying case * Complete, easy-to-follow instructions