Gridfinity bases that can be attached to the Ikea Skadis pegboard. They are based on the weighted Gridfinity baseplate so you can add magnets to help keep things in place.
Gridfinity units are 42mm wide, and the Skadis pegboard holes are only 40mm apart, so unfortunately these can't go directly next to each other on the pegboard.
The upper hook requires supports. I recommend using a support enforcer so that only the under side of the hook is supported and letting your printer bridge the rest.
The author hasn't provided the model origin yet.