Tractor supply carries the auger anchors. Minimum of 24”. Prefer 30”. We took a large socket. Slotted it and added welded small angle iron to the cut outs. Made it snug to the eye on top of the anchor. We use a dewalt impact to slowly drive the anchor into the ground. I used a hardened impact socket. Take your time. I got tired of spinning a crowbar to drive the anchors in the ground.