A friend digs these up in his yard in Southbury CT. Made of aluminum, joined at ends by a 1/2" threaded stud, holding a wood insert of unknown configuration with four copper rivets. I suspect a bracing device of some type, but any info would be great!
I don’t see a way to add pic!
The SDMB doesn’t allow posters to upload images, but you could try putting it on a site like imgur and pasting the link here.