Hmmmmm ??

[Amce54]

I thought I've seen his in a book what is this and why is it so strong of a signal?

 

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[Msbeepbeep]

I have no idea, interesting though. Try posting it in the "What's it" forum.

 

[SusanMN]

Not sure what it is, but if it's iron, rusty and buried, it will give off a big signal.

 

[Terry Soloman]

Just another iron P.O.G. Better luck next time!

 

[hogge]

Part of a plow or harrow.