Thunder Basin Knives Survival Arrowhead and Kydex Sheath. 440 Stainless. 440 Stainless Steel - Wont rust, Holds its Edge, Strong. Serrated shaft allows for secure lashing of the arrowhead to a spear or arrow shaft. Anchor hole for tethering of the arrowhead. Kydex sheath securely holds the arrowhead. Can piggy back to an Esee Knife Sheath. A MUST HAVE for every survival kit.