This is a clip on accessory designed to attach a fender rope to. It clips on to the top aluminum railing of a pontoon boat, and has a tie off point to attach a fender. It is designed to print without supports, and on its side for the best strength. It features retention lips for a secure and satisfying “click” as it locks in to place on the aluminum railing. It fits aluminum railing 33mm deep and 32mm in height. The extra millimeter on the depth is to accommodate for the common “lip” on the rear edge of the aluminum rail, most commonly a welding bead, or fold that holds the side panels. The rear of the clip is thin enough to fit between the railing, and the seats on most models I have tested it on.