The Lansky Controlled-Angle Sharpening System is a guided knife sharpening system that ensures your knife gets sharpened to the exact bevel you specify every time. This system is designed to give your blade a professional, razor sharp edge regardless of your sharpening ability. The Lansky Standard 3-Stone Controlled-Angle Sharpening System features: Coarse Red Hone: (120 grit) for edge reconditioning, Medium Green Hone: (280 grit) for sharpening and less frequent touch-ups, Fine Blue Hone: (600 grit) 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.