Description The Fish Finder Mounts Down Rigger Adapter Plate with Pontoon Rail Clamp comes with your choice of of a Square Rail Clamp (fits 7/8″ to 1.5″ square rails) or a Round Rail Clamp (fits 7/8″ and 1″ diameter rails.) Fits Scotty, Cannon and Seahorse Troll-Master downriggers.
