kastking fillet knife 6 inch, professional level knives for filleting fish, boning meat and processing any food.... kastking kastking madbite knives are the ultimate tool for every fisherman. the beautiful, black g4116 german stainless-steel blades are razor sharp and maintain their edge for those hard jobs that use to take so much time.they feature a light-weight and slip resistant super polymer grip that is both comfortable and highly functional, it is great for filleting and boning. these oversized grips stay solid in your hand and make fish processing and bait preparation quick and simple.every kastking bait and fillet knife includes a light-weight and durable sheath to protect your blade and keep it razor sharp when not in use.the durable g4116 german stainless-steel blades make these knives perfect for use in every fresh or saltwater fishing application.