Fishing Fillet Knife Set,Bait Knife w/ Protective Sheath,Razor Sharp BladePREMIUM & DURABLE MATERIALS The higher end fillet knives are made of stainless steel that are noncorrosive, provide the necessary flexibility, sharpen easily, and hold their edge for a very long time. The knife also features a non stick coating on the blade so that you can slice through the meat of the fish more easily and quickly. If youre looking for a rugged fillet knife to be used outdoors, in the bush, on the dock, etc., this is a great option.