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 Diamonds
Extra Coarse Silver Hone:  (70 grit diamond) for re-profiling the bevel grind
Coarse Purple Hone:  (120 grit diamond) for edge reconditioning
Medium Orange Hone:  (280 grit diamond) for sharpening and less frequent touch-ups
Fine Gold Hone:  (600 grit diamond) for most frequent touch-ups to keep your blade paper-slicing sharp
Honing Oil:  Specially Formulated for sharpening
Easy to use, multi-angle clamp:  to hold the blade securely. Guide Rods: One for every hone