All the statements I make are MY opinion as I'm no expert .1st the copper piece looks maybe as if it were a hook to hang things on 
& As for the ax heads [that are nice] I like to keep all the ones I find [witch are pretty common] as most relic hunters of the past & some now , consider them worthless. Many of them clean up well through whatever iron cleaning process that suites you. Being of the Civil war Era IMO ax heads are like Horseshoes , if dug in a known Camp or Battlefield area they could be CW era but when dug elsewhere the odds are they are NOT CW era. It can be very hard to tell as H shoes & ax heads were common items both before & after the CW. Personally I like to keep each one I dig [ax heads] caouse each one is different & they appeal to me for some reason
. So good luck and may your finds be great & plenty. God Bless.
