The Troll-Master Hydrodynamic Line Release is specifically engineered to reduce water resistance. The design minimizes the turbulence allowing for natural bait and lure presentation. Lower resistance results in decreased blow-back. This line release was specifically designed to be used with downriggers. It can be successfully used with outriggers, flat lines, and kites. The Troll-Master line release is perfect for most freshwater and saltwater applications. Recommended to be used with 10-25lb tackle.