This honing steel offers exceptional honing of your knives. Even high quality knives such as those made by Wusthof will gradually dull with use. Regular use of a honing steel will compensate for this. A few strokes of both sides of the knife over the sharpening steel helps to maintain the sharpness of a good blade. Wusthof recommends using a Diamond Steel or a Ceramic Steel to restore the sharpness of particularly blunt knives.