Designed exclusively for Lunds Sport Track accessory rail mount system, the Extreme Max 3005.4411 Downrigger Mount provides a secure attachment between your boats Sport Track system and your favorite downrigger. The 6" x 6" plate contains mounting pattern configurations for the most common downrigger mounting patterns, fitting downriggers from Cannon, Big Jon, Scotty, and more. Beneath the mounting plate, the base features two oversized support knobs that extend downward to the gunwale to add support that eliminates flexing and shifting of the base while the downrigger is in use. The bases durable aluminum construction provides the strength needed to support your accessories and offers great protection against rust and other damage.