There are several ways to connect fenders to the vessel or dock.
Chain (non galvanized) for boatfender use.
Very strong chain (non galvanized) for boatfender use.
The chain is connected true the bead of the tyre. The bead is the strongest way to connect the tire to the dock or vessel.
Very strong because it uses the bead of the tyre
Yellow H schackle with safety pin