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.