The 3-tier Seville Shoe Rack features an iron frame construction with solid bamboo shelves. It can stack vertically to build a multi-level shelf system or interlock horizontally allowing you to design your own custom furniture. This 2-pack allows you to stack two units vertically giving you six shelves in a mere 68cm of closet space or connect it horizontally to fill over 1.8m of floor space. Easy to assemble. No tools required