The Walker Downrigger Swivel Base gives Great Lakes and offshore trollers smooth 360Adeg rotation and secure locking positions for precise downrigger placement. Made from durable aluminum with a protective finish, this base fits all Walker Downriggers with a 4 in. x 6 in. mounting footprint. It features a low-profile, easy-to-grip silver locking lever for quick angle adjustments, helping you fine-tune presentations for salmon, lake trout, and other deep-holding species. Its rugged design holds up to repeated use in harsh marine environments. Fits all Walker Downriggers with a 4 in. x 6 in. base 360Adeg rotation with locking positions for directional control Durable aluminum construction with protective finish Large silver lever for quick, secure adjustments