With cooked and uncooked meat, boning knives are used for separating meat from bone. The flexibility and length of the blade should be paired up to the size of the meat or bone. The longer the knife, the more flexible it should be when working with fowl or fish. So this Henckels Four Star - 5 1/2" Flex. Boning Knife is perfect for those mid-sized fillets or cuts of fowl that need intricate cuts. It comes with a Sigmaforge one piece polypropylene handle, and the Friodur Ice hardened blade with laser controlled sharpness.