I remixed Spooner2011's finger hook (thanks Spooner!) to fix up the manifold errors (overlapping objects) which were giving me problems slicing with KISSlicer, plus I added some wall-mountable screw slots for a sturdy way of fixing it to the wall.
See my new derivative that eliminates the base completely while still being screw mountable!
finger_hook_with_screw_slots_repaired.stl |