Skipper 2 pet carrier keys. I lost a couple of the keys and was hoping the carrier would stay together the last time I used it.
I saw this design, https://www.printables.com/model/298186-twist-lock-for-cat-transport-box but it was for a different carrier.
I fired up openScad and made my own. It worked just fine.
I printed it on its side with support with PLA with a layer height of 0.2.
It's not pretty but it works.
The author hasn't provided the model origin yet.