I couldn't find a wall hook I liked for download so I made one. This is based on a similar product that you can buy. I wanted one that could be printed on edge (for strength) without supports. It also needed to be low profile to sit behind the picture frame. The V2 model includes a chamfer on the leading edge to make it less likely to hang up on the wall bracket when hanging a picture. I think it's better but haven't tested it so I included both models.
I printed in PLA with a 0.8mm nozzle. I do recommend printing it on edge in orientation of the model. It will just give it more strength. Nobody wants their pictures to fall off the wall.
The author marked this model as their own original creation.