Cast iron. The Kennel club describes bulldogs as kind, courageous, friendly, resolute and will form bonds with children. The charming white English Bulldog pups are on guard duty, patiently watching and waiting for their master to return. Stubbornly loyal, protective bulldogs are used as mascots for many groups including the British royal navy and the U.S. Marines Corps to remind all to do the right thing. Bookends serve as punctuation marks in a library, showcasing your interests, and adding character to any room, shelf, or credenza. This ideal heavyweight pair of over the fence bulldogs serve as functional art while giving literary support to your favorite books.