This broad-bladed fish knife is a single-edged knife. Used mainly to fillet fish into three pieces. Be careful, as unlike a double-edged knife, it is difficult to make straight cuts.Wash with dish detergent before first usage.Do not use a scrub brush or polishing powder with this product.Do not touch the blade.Immediately discontinue use if the product becomes deformed or damaged.Keep away from fire and other sources of heat.Do not use this product for purposes other than its intended purposes.