The Gatco Edgemate 5-Stone Ultimate Diamond Knife Sharpening System is ideal for those who demand the ultimate performance in a sharpening system. Diamond hones can quickly sharpen the hardest steel. The Edgemate 5-Stone Ultimate Diamond System is capable of sharpening both plain and serrated edges. - The Ultimate Diamond system utilizes the GATCO exclusive knife clamp/angle guide to insure that all cutting tools can be easily sharpened to a precise razor-like edge. Perfect for the beginer or sharpening fanatic alike. - THIS SYSTEM CONTAINS: - GATCO exclusive six-angle knife clamp/angle guide insures a precision honing action - Coarse monocrystalline diamond hone - Medium monocrystalline diamond hone - Fine monocrystalline diamond hone - 1200 grit ceramic finishing hone for the ultimate finish edge - Special serrated knife hone - 2 ounces of honing oil meeting FDA standards for safety with food contact - Custom case with easy to follow instructions permanently affixed to lid