Standing five-shelf unit with a steel rack and shelves made of particle board. Riveted beams and riveted braces lock into corner post rivet holes for structural security. Corner post rivet holes are punched at 1-12-in intervals for precise installation of shelves at desired height. Steel frame with black powder coat finish to resist chipping and corrosion. Rivet lock design for boltless assembly instructions included rubber mallet recommended for assembly sold separately.