I never knew I needed these until I saw someone else created them. I noticed and just dealt with the fact that our shower curtain clips would come undone, I just re-clipped them, but now I don’t have to, these just slide over the clip and lock them.
I needed some kind of a hook for my shelves and found these over on Thingiverse. I needed a lot of them so I figured I’d print one in each color of PLA filament I have.
Clips of all kinds are useful and this one is called a chip clip but it can be used for other things. It’s not bad but the design need reworked I think or maybe printed in something other than PLA. After a few used it stretched out and became loose.