This Muscle Rack unit is a free-standing, five-shelf system featuring a steel frame and particle-board shelves. It uses riveted beams and braces that lock into posts with rivet holes for structural stability. The posts can be adjusted in 1.5-inch increments. The steel frame has a black, powder-coated finish to resist chipping and corrosion. When assembled, the unit measures 72 48 24 inches (H W D). Its rivet-lock design allows for boltless assembly.