So Oklahoma has some pretty hard soil. Lots of clay so digging is pretty hard with a smooth bucket. But with a tooth bar it makes breaking into the ground much easier. It’s kinda the difference between diving into water and a belly flop. The largest drill bit I had was only 1/2″ so I also use the Harbor Freight silver and deming drill bit set. sizes: 9/16,5/8,11/16,3/4,13/16,7/8,15/16 and 1″ I use a 3/4″ drill bit for the bolt to go through the bucket.