Hook for ceiling lamp rail

I designed this hook for our ceiling lamp rails. There is a large model and a smaller, much stronger version. We will mostly use it for decorations and such but i am sure it can be used for anything else. Use them as you like.

They are easy to print and can be mounted on the rails by simply rotating them 90 degrees, and they lock in place. Keep in mind these are made for rails that measure 13.5mm (roughly 1/2 inch)