Best Gift Choice -- [ No Assembly ] Only 1 step, just open the black frame and snap the 4 Shelves on it,the entire process takes only 1 minute and does not require installation tools. Industrial Bookshelf --[Folding] When not in use can be folded in the corner, save space. Industrial Bookshelf -- [STURDY IRON FRAME] Sturdy black coated iron frame with two oblique side bars and extra back bars for a better stability and resistance.