This hook is designed to secure a Velleda whiteboard to a Skädis board.
It is to be used with https://www.printables.com/fr/model/907314-skadis-reversed-hook so the whiteboard is held correctly to the Skädis board.
The author remixed this model.
I enlarged the radius of the original hook so that it can accomodate a Velleda whiteboard.