The Apex Model Edge Pro knife sharpening kit is a patented Apex system that will sharpen any size or shape blade (up to 3 ½" wide), including serrated knives. With an Apex knife sharpener, knives can be sharpened at exactly the same angle every time, making re-sharpening so fast you will never work with a dull blade again. Our water stones have been custom formulated to free you from messy, gummed-up oil stones. They last a long time and are inexpensive to replace. The Edge Pro Apex 4 Kit will remove far less metal than electric sharpeners or grinders, eliminating wavy edges and adding to the life and performance of your knives. Try this Edge Pro knife sharpener kit today!