Tojo-bieg bookshelf. The German design team Eigenwert has created a smaller version of the popular Stell shelving system: the sturdy shelves made of white-coated MDF remain, but are now combined with delicate metal brackets as spacers in the shelf. The structural appeal of these vertically bent metal angles at 90° gives the shelf its distinctive name. The eponymous German manufacturer offers the shelf in two angle heights, small with 23 cm and large with 31 cm shelf height. The shelving system is freestanding and can be extended in height with additional extension sets, allowing for flexible combinations of shelf heights – making it a perfect room divider. Tojo-bieg bookshelf extension element. With one shelf and three metal angles each, the shelving system can be expanded in height on an optionally available base element.