Purchased 2 each of 4 shelf, 2 shelf, and 4 drawer cabinets. Most likely will buy more. Design, packaging, and instructions are very well thought out. Each component has molded in alphabetical labels and snaps together with only tool (helpful but not necessary) was a light rubber mallet to help secure the assembly locking features. Appears that drawer & 2 shelf unit are stackable (either way) if connectors/ splines can replace the corner plugs that are removable. Checking on availability via e-mail. Great products with better rigidity than expected.