I think you know what this is, but if not:

This is a simple passthrough fidget I made just for fun. The idea is that one part keeps sliding through the other in a continuous loop, so you can just sit there and move it back and forth without thinking about it.

It doesn’t do anything complicated, but that’s kind of the point. The movement is smooth and repetitive, which makes it nice to play with when you’re bored or need something for your hands.

I tried to keep the design clean and easy to print, so it should work without any issues if your printer is dialed in.

Feel free to download, print, and mess around with it.