Rebuilt with an intuitive, easy-to-use design, the Riptide Transom delivers power and precision maneuverability. With a push-to-test battery meter, the battery-extending power of Digital Maximizer (on select models) and unmatched corrosion protection, Riptide Transom means fish are out of places to hide. We use metals that are properly balanced & a composite shaft to ward off galvanic corrosion. So the only piece left for saltwater to attack is this little zinc anode, which absorbs corrosion so the rest of the motor doesn't have to.