to:
A metal anchor
A concrete footing
An old support system
Another piece of buried hardware
But don’t assume every buried chain is a mailbox anchor.
Older properties can contain all kinds of forgotten objects:
Old fence hardware
Landscaping supports
Farm equipment parts
Utility remnants
Homemade repairs
The only way to know for sure is to carefully determine what the chain is connected to.
And if you’re digging around an older property, always be cautious about underground electrical, water, gas, or communication lines.
The Fascinating Thing About Old Mailbox Hardware