This is a fully 3d printed clip that you can use for whatever you need. It prints in 2 parts: the spring and the main body. To assemble just slide the spring into the grooves in the body making sure it is fully seated. The spring provides pre-tension to make the clip as strong as possible.
 

If you liked this model, consider checking out my Differential Gearbox Fidget 
https://makerworld.com/en/models/1570028-differential-gearbox-fidget-v2#profileId-1651136