This set of bar stools is made of high-strength metal steel, featured with modern industrial style. Under the seat, it’s supported by X-brace for better stability and durability. It also comes with rubber feet, to keep chairs from sliding and scratching floors. Besides, its stackable design & compact size help to save more space and could be widely used indoors and outdoors, such as bar, cafe, restaurant, kitchen and patio bistro. (While placing outdoors, it’s suggested to use covers to protect chair in rainy days.)