Metal base, a type of wall base, is made of some form of metal (e.g., steel, aluminum, alloy, etc.). Metal base is most often chosen for robust protection in an application such as a freight elevator. When protection is the top objective, metal base will logically stand taller (e.g., 1 foot) than other forms of wall base. However, creative designs can also incorporate metal into flooring and as a wall base. Surface texture may be diamond plate, tread plate, smooth, or otherwise. The surface finish can range from flat or polished.