KEEPER® 48 in Marine Twin Anchor® bungee cords are made from the highest quality materials for long-lasting dependability no matter what the application. All KEEPER® bungee cords are designed to withstand UV rays and weather damage with durable outer jackets. Premium rubber ensures top quality performance and outstanding toughness. Twin Anchor Marine Cords® are made with stainless steel double wire hooks with molded grip. Bulk.