This small hook - split into two interlocking parts for optimal orientation and strength - will hold just about anything with a hole in it. Print with plenty of perimeters and use a brim if you really need to (not required).
This model uses my locking pegboard mount system for 1" standard pegboards. Magnet holes (if present) are designed for 10mm diameter, 3mm thick magnets. “Board Attachment” parts are universal to all models. Print with 3 perimeters and 0.3mm or thinner layer height for best results.
To mount, fold the "Board Attachment" model, insert it into the pegboard so the triangular surface points up, then slide the mount over top. With a bit of force it should fully lock into place. If needed, use a small mallet or similar to mount/remove.
The author remixed this model.