Lansky Sharpeners 3-Stone Standard Diamond System. The Lansky 3-Stone Diamond Sharpening Kit is the ultimate in knife-sharpening technology The sharpener kit is safe convenient and easy to use with the Lansky Controlled Angle Sharpening System making it easy to give your blade a professional razor-sharp edge every time. Sharpening Angles: 17 Angle - A severe angle recommended for razor blades X-Acto 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. Recommended for heavy duty use. Features of Lansky 3-Stone Standard Diamond Sharpening System: 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 Package Contents: Lansky Sharpeners 3-Stone Standard Diamond System Lansky Sharpeners LK3DM: 3-Stone Standard Diamond System