(LS51} Includes Coarse Diamond (120 grit), Medium Diamond (280 grit), and Fine Diamond (600 grit) Hones The Ultimate in Knife Sharpening Systems Technology. 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: 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 Sharpening Angles 17° Angle - A severe angle reccommended for razor blades, scalpels or similar tools. Provides an extremely sharp but delicate edge. 20° Angle - A commonly used angle for higher quality blades and provides an excellent edge for kitchen cutlery and filet knives. 25° Angle - The recommended angle for most knives that need a durable, sharp edge. Ideal for hunting and outdoor knives. 30° Angle - An outstanding angle for knives that see the heavy use of cutting cardboard, wire or carpets. Recomended for heavy duty use. USA