This tool is a monster. It does not tell you in the description, but it comes with a bit. Thankfully the bit I bought wasn't the same size as the one in the box. Buying this one was cheaper than renting one at hi me depot. This is a 2 man job, I was able to do it alone, but it is very powerful, and I was wishing I had some help in a 6" hole. When you dig like 3 to 4" holes it is very simple. I tried a 6" by myself it was a bit much. Without hesitation, it digs your post hole, very clean, So when you extract it form ground, a bunch of dirt doesn't fall back in.