Regular sharpening is crucial for maintaining their quality over the long term. The ZWILLING V-Edge knife sharpener professionally sharpens knives for you. Its patented sharpening mechanism is incredibly simple and wholly effective. Simply pull the knife's blade at a diagonal from above in a downward direction and the V-Edge does the rest. 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. The adapter not currently in use is conveniently stored in the base of the V-Edge to save space.