In seriousness, we use metal posts, so they pretty much drive themselves. Well, with a sledge.
You only have to use a PHD at the gates.
Never had a better workout than when I am swinging a 15lb sledge all day.
Sledge is okay. There's something about the repetitive motion of the PHD that creates inhuman pain at the end of the day. When I did that work I actually dreamed about digging holes at night.