Sonar 1/2 oz. Lemon/Lime Shad Fishing Lure (X0433LLS) by Heddon®. Heddon's only adjustable-action lure. The Sonar's unique linetie holes allow anglers to adjust the lure's action to match the fishing situation. Whether cast, trolled or jigged through the ice, the Sonar series has the perfect vibrating action to entice most freshwater species into rod-busting strikes. Heddon Sonar is the only lure that allows fisherman to adjust the linetie for the fishing action of the day.