This is a hook that can fit on door locks that look alot like the image below.

I made it because my "lock" broke and instead of replacing the entire lock, just replace the hook!
I used Freecad to model this, and i'm not sure of all of the locks look the same, but feel free to modify the STEP file or the Freecad project file to your needs
The author marked this model as their own original creation.