My home has curtain holders rail type, but my curtains are ring type, so I created these rail to hook type converters to be able to use my curtains.

Normally the hook/ring curtains are held with 6-8 rings while the rail type curtains are attached with more points. So I made each ring attach to 3 rail type hooks to make sure the weight is more spread and it handles even more heavy curtains. If you don't have so many rail hooks, you can just use the 2 on the edges.

This is printed sideways at the angle to ensure layer lines are not pulled directly, making it stronger and using minimal supports.