Good tool and does what it's supposed to. Confusion with the mentioned 3/8. I thought it would also fit a 3/8 socket, but it doesn't. It almost fits in a 5/16 socket, but I can't find a socket that fits exactly, so I gave up and attached it directly to the drill press. I bought it for the length while also hoping to attach it to a deep socket with an extension cord. I needed a 26" deep hole and when I connected it with a drill I was able to get the required depth. The area I drilled had small rocks 2-3" wide and lots of small tree roots. Despite the tools can't go through and eject rocks, they don't break or warp, and I was able to pull the rock out by hand, it was able to cut small 1/4" roots.