Two variants of hooks intended to be used with Command strips. I won't claim they're better than the actual hooks you can buy but if you have a bunch of spare adhesive strips lying around these work pretty well.

The wall hook is meant to go on the wall like a regular command hook. The door hook is meant to go over the top of a door frame or similar.

The best way to print these is on their side. That way you don't get any weak points along the layer lines. This does require supports but only a small bit.