Summary

This is for the PUPETPO foldable indoor fence sold on Amazon.

Using the last panel for a gate, our puppy figured out how to get it to swing open.
I designed this simple clamp that fits over the top rail to keep the section from swinging open.
The rail is 18mm thick and I allowed 19mm so it should be tight but able to removed easily.

This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/bfvB1B6whyD