Take command of controlled depth fishing when you equip your boat with a Uni-Troll downrigger. Features a 2: 1 retrieval speed, three digit depth counter, and a 24â stainless steel boom. 2: 1 Retrieval Rate - The 2: 1 retrieval rate makes getting lines out of the water fast and nearly effortless. Stainless Steel Boom - 24" Composite Spool - Comes pre-spooled with 200' of 150 lb of stainless steel cable. | Cannon Uni-Troll 5 Manual Downrigger, 24" boom