A useful rail with shiftable hooks, which can be attached to a surface using double-sided tape. You have the option to print either short or long hooks.
I have printed the rail in PLA with 0.2mm layer height. There are no supports required for this print. I used up to 6 hooks inside a single rail, but surely there can be more or less. The hooks can be moved freely, but are not too loose. You have the option to print either short or long hooks (or mix both). On the photo you only see the short hooks.
Please print two stoppers (stopper.stl) and glue them to both ends (after having added the hooks ;-) ).
The author hasn't provided the model origin yet.