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. Technical Information: THIS SYSTEM CONTAINS: 80-Grit Extra-Coarse sharpening hone 120-Grit Coarse sharpening hone 220-Grit Medium sharpening hone 320-Grit Fine sharpening hone Serrated knife sharpening hone Scientifically formulated honing oil GATCO exclusive knife clamp/angle guide Custom carrying case with instructions permanently affixed to lid