Kershaw offers a range of convenient filleting knives, all with high-carbon stainless-steel blades that provide the ideal degree of flex for fast and easy filleting. Choose one of our fixed-blade fillet knives with sure-grip co-polymer handles?including our new 6-inch fillet. For the ultimate in versatility, choose our 7-Step Fillet Knife, which adjusts from 5 1/2 to 9 inches. Its injection-molded handle is contoured for a secure grip, even in slippery conditions. For compact filleting, select the Folding Fillet Knife with.