Summary

A keyring for the Avonlea letterbox by Northcote Pottery. Having just installed the letterbox I needed something to identify the spare keys that would likely be put away and forgotten about for years. What better than a custom made tiny letterbox.

The ring is quite thick to give it strength. I used a pen to open up my metal ring and fit over it. You can edit the freeCAD file (included) to change the radius if you'd like it thinner.