I made this hook, so i can hang my lights. Hook is strong enough to hold different things as well. I created slid on the hook itself for a screw holder, so you can mount the holder first, then put hook over it. It fits 4mm screws in diameter with flat head.

Printed in PLA and PETG, works great, but could be printed in different types of plastic as well.

I recommend printing with supports, but you may be able to print it without them. If you don't want to drill holes in wall, you can use hot glue gun and just glue the hook directly to the wall. Both ways work

Can be scaled up or down based on your application

Feel free to comment and remix it. If you have any questions, feel free to ask!