One glance at that exposed extruded aluminum arm and you'll know this is the ultimate weapon in saltwater: Riptide SF. It features up to 112lbs of thrust and a Mono-Arm Design to help you push through anything and everything. So when the battle against saltwater begins, make sure the toughest guy in the room is on your side. Let's talk arm strength. Specifically, one made of extruded, anodized aluminum that provides unmatched ruggedness. That's Mono-Arm Design, only on Riptide SF. Backed with solid one-piece construction, it helps SF run with less wear, longer life and quieter operation.