Vice, drill hole thought the copper ,throught the woods lenght. And get a peice of all tread, washer tighten it down.
Coppers use because it's a solf metal. Its right there with lead then gold its our softest metal, we have.
Like solf antler when pushed into the edge. Even though the edge looks,pointy,smooth to us it's not it's felled with cuts,grove holes etc. When pushed in the solf copper fills these places enabling to hold so you can pop a flake off.