Screw thread lock Shackle (watch the video)

That model designed and printed for fan only and not for realy life use...

instructions:
1. Do not scale the model (because of build in tolarences).
2. Print with 0.2 or less layer height.
3. Print with support (touching buildplace) only.
4. After print finished, remove the 2 structured supports (blue ones) like on the image i provided above.
5. With some force rotate the lock mechanism to break little structure dots inside (see the image above)
6. Enjoy !

https://youtu.be/c6WX5N6Nl3g