The Gatco Edgemate 5-Stone Professional Knife Sharpening System is the professional-grade knife sharpening system that will sharpen all kitchen, sport, and utility cutlery including knives and cutting tools with serrated blades. Never before has a single sharpening system done so much! This specialty product utilizes the GATCO exclusive knife clamp/angle guide to insure that all cutting tools can be easily sharpened to a precise razor-like edge.