Smith's 50448 6-Inch Diamond Tri-Hone Sharpener Sharpens everything from very dull or damaged blade to sharp blades in need of quick touchup Natural Arkansas and diamond stones; Interrupted surface on diamond stones speeds sharpening Larger stones allow for use with small or large knives; Works on a variety of knives and tools Easy to rotate and identify stones; Non-skid, plastic base; Trough in base to catch excess lubricant Premium honing solution, sharpening instructions and angle guide included