Tojo High-Stacker Shelving System. This high-stacker by Dirk Frömchen for Tojo Möbel lives up to its unassuming name, as it is a brilliantly simple (almost) infinitely expandable system for storing books, files, and display items. And all this without screws, drilling, or other bothersome DIY tasks. For vertical stacking, primarily extension components are used – two side panels with a shelf. The top is capped with a cuboid base element featuring a bottom and a smoothly finishing top. The distinctly milled sides give the shelf a unique appearance, but they primarily serve to ensure a stable connection between the loosely stacked individual elements. The bottom of each element is secured in such a way that it prevents lateral shifting of the element placed on top.