As another person posted, these nails are awful. I tried to hammer two into my backyard ground and they bent and broke, at the eyelet, where the metal is much thinner. I had more success with the factory stakes that came with my Big Agnes Fly Creek UL2 stakes. Big bummer and feel so misled, as these are nails and suppose to be able to penetrate hard ground that a thinner aluminum stake would not.
JaccoWI am surprised 44 people bought them. I was severely disappointed. I didn't even get to use one in the real world. My Walmart $0.76 stakes do better. I've hammered them with rocks and did not have any failures, yet, while half of these failed and I'm scared to take them with me.