The Apex Model Edge Pro is a patented system that will sharpen any size or shape blade (up to 3 ½" wide), including serrated knives. 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. Edge Pro 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 Apex will remove far less metal than electric sharpeners or grinders, eliminating wavy edges and adding to the life and performance of your knives. You will get reliable, consistent results, and a mirror finish that shaves with this system. Full instructions and DVD are included with the kit.