Modular Tool organizer(s). Wrench and socket organisers in multiple sizes (more to follow). Each block uses two 6x3 magnets if you want them be used and easily to moved around in metal tool drawers.

Work in progress This design is loosely based on this item on makerworld: (https://makerworld.com/en/models/44779#profileId-46422)

They print without any supports. More sizes and 'end' pieces available here: https://www.printables.com/model/1322005-modular-tool-organizer