Keep your boat clean and free of birds! Repel-A-Bird is a spider-like bird deterrent that requires no power of any kind. Twelve stainless steel arms reach out to cover a wide amount of space and deter almost any type of bird. Amazingly effective, Repel-A-Bird mounts easily in most areas where it's needed. The optional sand-filled bag mounting base is great for use on biminis, sail covers, and decks.