I "reverse engineered" a Gate Door holder to prevent my dogs from pulling open a small gate 

Might be a bit confusing but if you print for example the left frame and you break a piece then I've made it so you can print either the Left or right Piece without having to reprint the whole mechanism. Hope this helps 

I am assuming it's public domain so there shouldnt be an issue with replicating the system

 I found the original idea on a YouTube short go check out "Simple Idea" on YouTube, they render many more cool ideas like this one

This is my own take but it uses an almost identical system to the one in that video, I dont know who came up with this idea but it's awesome I hope u like my take on it.

Printed in white PLA