A little bit of flex in your blade steel makes filleting fish easier. The Kai PRO 6-inch Flexible Fillet offers just the right amount thanks to our precision heat treatment process. That little bit of flex lets the knife conform to the ribs of the fish, removing meat from bones quickly and easily. It works equally well removing skin, boning, and trimming out meats and poultry. In every case, PRO makes the job easier.