Suitable for freshwater and saltwater Galvanized finish Heavy duty construction for marine environments Marine grade metal Great for small boats, jet skis, kayuaks, and more! Gen3 Marine’s Heavy Duty Dock Cleat features a galvanized finish to ensure they hold up against rust ...Suitable for freshwater and saltwater Galvanized finish Heavy duty construction for marine environments Marine grade metal Great for small boats, jet skis, kayuaks, and more! Gen3 Marine’s Heavy Duty Dock Cleat features a galvanized finish to ensure they hold up against rust, corrosion, and different marine conditions. They work in both freshwater and saltwater environments making them the ideal dock cleat for small boats, kayaks, jet skis, etc. Gen3’s Heavy Duty Dock Cleat is the perfect addition to any dock, pier, or boat.