Summary

This is a OpenLOCK hexagonal base of the size of the Settlers of Catan tiles. You can place your 3D Catan designs on top of this and then use the OpenLOCK clips to put them together in any configuration. I prefer this over having to have magnets or other methods of connection. They just snap together.

You can get the clip for free at this link.
https://www.thingiverse.com/thing:2343306

This is a lot easier than buying magnets and holds them tighter. You can pick the whole thing up and move it without having to redo the configuration.