Galvanic corrosion occurs when two dissimilar metals come into electrical contact through saltwater. Riptide fights back with a sacrificial zinc anode, a composite shaft and properly balanced materials that are close in electrical potential. The result is a motor that's completely protected from saltwater's destructive forces. Lifting the motor and bowguard off of the mount is now even easier on Riptide SF - just remove a single cap screw. The Bowguard 360'™ also features a dual bearing system that eliminates noise and allows for improved breakaways from any angle.