I fixed the electric drill on hand so that we can chamfer the pipe inner diameter of the copper piping. It was almost the shape I expected. Since the chamfering work with a hand tool is very inefficient, I was looking for a thing that can be easily chamfered, but I could not find a good thing at a low price and I arrived at a horizontal drill stand. I think that efficiency was improved compared to hand tools. I would like to further improve efficiency.