The Wüsthof Classic Ikon Fillet Knife (4556 / 16) is a CLASSIC IKON 6" Flexible Fillet Knife has a very thin flexible blade used for deboning and filleting fish. The long narrow blade enables the knife to move smoothly along the backbone of the fish and easily removes the fish skin. The flexible design makes it easier to maneuver around smaller bones. Keep your Wusthof knives sharp and well-maintained by regularly using a Wusthof Sharpening Steel and store them in style with a l arge Oak and Beech Knife Block.