Cannot compare these nails to others as I have never used copper nails. That being said, they worked great with the copper pole caps I used them on, which are 6" x 6" pressure machined rods. I would give it 5 stars but again I have no comparison.
π© Hard-to-Find Quick Fastener 014973253790 - 4 Piece Set
7 Review
Premium Eapele 4X4 Wood Fence πͺ΅ Post Anchor Base: Secure Your Fence with Ease
8 Review
πͺ Strong and Versatile: National Hardware N222 406 Square Bolts for Secure Fastening
7 Review
π© M6 1.0 Stainless Steel Flanged Hexagon Flange
8 Review