Spyderco Caspian Salt Rust Free Combination Edge Knife, Black A unique fixed-blade knife designed specifically for use in and around the water Hollow-ground from H-1, an extraordinary steel that is totally impervious to rust Ring-style index-finger hole provides a unique grip that allows the fingers to grasp things and prevents dropping Versatile sharp-tip design makes the perfect high-performance fishing or diving knife Injection-molded FRN sheath with mounting straps