The Extreme Max 3006.8649 Rod Holder Mount Adjustable Transducer Bracket mounts to existing fishing rod holder brackets, but also includes a new locking rod holder bracket for new installations if needed. The bracket features a quick-release for easy installation and removal during travel and storage. The bracket offers a universal head unit mounting plate and universal transducer mounting plate that work seamlessly with most head units and transducers found today. The bracket features a range of adjustability in the head angle plate, transducer height, and distance over the boat rail. The base attaches to any flat surface or track base, such as a boat gunwale or the Extreme Max aluminum Slider Base and nylon Slider Trax series bases. Designed for use at trolling speeds only.