Included in this set is a Pro 7" Chef Knife and V Edge Vertical Sharpener. Even the best blades lose their edge over time, meaning that regular sharpening is crucial for maintaining their quality over the long term. This sharpeners' patented sharpening mechanism is incredibly simple and wholly effective. The V-shape arranged ceramic sharpening stones evenly sharpen the entire length of the blade without risk of damaging it. Different angle adapters are included for European and Japanese knives.