These fenders were originally designed by Schuyler, and are custom built of durable, laminated rubber — no other rubber is stronger. The rubber laminates are compressed onto high quality steel rods, welded or attached with nuts to end plates. The steel rod and plate frame is allowed to flex through the use of a patented hinge type assembly system. Chain links are installed top and bottom as specified, and the end plates can be flat bar or angle. Our fenders are manufactured for a tight hull fit. These models are also available with weld tabs.