 Hooks are designed as either "single" hooks—a single eye, shank and point; "double" hooks—a single eye merged with two shanks and points; or "triple"—a single eye merged with three shanks and three evenly spaced points.Double hooks are formed from a single piece of wire and may or may not have their shanks brazed together for strength.Treble hooks are formed by adding a single eyeless hook to a double hook and brazing all three shanks together.