Just remove the damn bollard

Buy a knockout punch. They sell wrench operated kits (checkout Greenlee https://www.greenlee.com/us/en/1-2-conduit-size-standard-round-manual-knockout-set-k3bb-1-2). That is the best way to make a clean hole. Use a center punch to mark the center of your hole, then pre drill the appropriate size pilot hole for the draw stud (draw stud is part of the knockout punch), then use the knockout punch per manufacturer.

The licky bandits