Lansky Sharpeners Standard Diamond Knife Sharpening System Safe, Easy and Convenient to Use. The Lansky Controlled-Angle Sharpening System is designed to give your blade a professional, razor sharp edge every time. All systems include: Patented, precision-engineered, multi-angle, flip-over knife clamp. Sharpening hones on color-coated, 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 to hold all system components Complete easy-to-follow multi-lingual instructions