Perfect for trolling when you have multiple fishermen, these Pucci Copper Sinker Releases replace diving planers to prevent tangling when multiple lines are close together. Insert the eye of your weight into the two-position spring-loaded arm. When a fish strikes, the pressure on your line releases your sinker, allowing you to fight the fish without the lead weight making it more difficult.Replace planers when trolling with multiple linesPlace sinkers eye in the two-position spring-loaded armPressure from a fish strike releases the sinker