Digging postholes are always difficult, but not with one of these. The holes don't dig themselves, but they're so much easier that you almost enjoy it. I start the hole with a regular posthole digger, place this in the started hole, apply a little pressure, turn this like a drill, and it just works it's way right down. You can dig an 18" to 24"  hole in red clay in a matter of minutes. Wish I had bought one of these years ago.