Old tool I cant figure out.

[NJ Marty]

Got this today in the 25 cent pile at the flea market. I think I have seen them before but cant place it.

 

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[fyrffytr1]

I think it is a math compass.
https://www.google.com/search?q=com...=org.mozilla:en-US:official&tbm=isch&imgdii=_

 

[cudamark]

Or just some dividers to measure with.

 

[stevefox]

It might be a variation of a rope splicing tool known as a fid.