Very high quality tool as expected from Amana. A notable improvement is the sharp cut when you want to drill a hole and fill it with a dowel. I have other countersinks that do the job well but always leave a slightly ragged hole. While this might seem like a minor issue, when it works like this, it's a sign of a quality tool. I bought some spare bits because Amana uses a short, custom-sized bit for this tool, but it's not necessary. The countersink uses a hollow shank so you can use a regular bit in the tool if you need a spare. The only improvement I'd like to see is this combo tool being able to drill a hole and turn a screw with the same drill bit.