This thing is mostly a way to share a parametric locking pattern to be able to assemble different part together.

With this thing, you can tune the best parameters before printing you whole thing (save a bit the planet and your money).
Then you can integrate the function in you design and be (more) confident you can assemble you parts nicely.

My optimum parameters are:
pitch angle= 5 degrees
marginal=0.32

Tips! You need to print one, and the next as mirror! :)

If you are not with OpenScad, this is the moment to jump in!