Found, HELP! What are these???

[C-Hauk]

These are some metal pieces we found on our property in Southeast PA! Can anyone help identify what they could be, and how old they might be?

 

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[HuntinDog]

Your first two look like the ends of single trees and in the other picture the round ring is a rains guide the other I would call wagon parts.
They could date all the way back into the 1800's

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[Plug N Play]

 

[C-Hauk]

This it the closest I’ve seen! Thanks. The ones I have are split, I’m assuming to allow for a wooden dowel to slip into it. I wonder what the age of this style would be.