Designed exclusively for Tracker Boat's Versatrack accessory rail mount system, the Extreme Max 3005.4158 Downrigger Bracket provides a sturdy base for your fishing downrigger! The universal 6" x 6" mounting plate features a wide range of pre-drilled mounting options to fit most popular downrigger brands. The rail bracket nestles securely into the boat's Versatrack system and offers an adjustable support pole to take the stress and tension off your mount and gunwale. When it's time to remove or reposition the mount, oversize knobs make it easy with no tools required. Its nylon and aluminum construction is both lightweight and protects against rust and other damage, keeping both your rails and boat looking clean and professional for years to come.