The 4-Stone Deluxe Diamond Controlled-Angle Sharpening System ensures that your knife edge sharpens to the exact bevel you specify. Designed to give your blade a professional, razor sharp edge every time, regardless of your sharpening ability. Excellent for beginners and advanced users alike. The original and legendary Controlled-Angle System is the ultimate in Knife Sharpening technology. Monocrystalline DiamondsExtra Coarse Silver Hone: (70 grit diamond) for re-profiling the bevel grindCoarse Purple Hone: (120 grit diamond) for edge reconditioningMedium Orange Hone: (280 grit diamond) for sharpening and less frequent touch-upsFine Gold Hone: (600 grit diamond) for most frequent touch-ups to keep your blade paper-slicing sharpHoning Oil: Specially Formulated for sharpeningEasy to use, multi-angle clamp: to hold the blade securely. Guide Rods: One for every honeN/A