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Copper is naturally a softer metal that many others used for nails and fasteners. Though this copper is half-hardened to reduce bending, you may still wish to exercise some best practices when hammering them into harder woods. 
Copper nail with threaded shank and rosehead
Our copper nails are half hard 12 gauge copper with a threaded shank for grip & attractive nail head. 

Drilling a pilot hole into wood
If you are hammering them into hard wood, you can drill a small pilot hole to prevent the nails from bending.
Rubber mallet
Protect the nail head
To protect the attractive head,
  • hold the nail in place with pliers (optional)
  • use a rubber mallet,
  • and/or place a piece of wood or fabric between the head of the nail and your hammer.