OK. So I gave these a four because they were not cleaned up and it seems like the company didn’t respect their own product. They came all bunched up together in a small box. They had the usual oil/grease on the blades. But they also had carbon from the manufacturing process that fell of in gritty little chunks like dirt. The drill bits were thrown in with the blades. The chuck was in a yellow plastic container which is good.Anyway. I tried one in a not-the-most-powerful cordless drill. It would be better to use these in a drill press or an electric drill because you can see in the picture that the hole was enlarged a little as I worked on the wood. It did take awhile, but it does a decent job. The size I used was 18. I do have a router. Mine isn’t a plunge router, though.To improve the value, the company should clean up the product and at least make small plastic bit holders and a plastic holder for the blades so they can be kept separated, organized and sharp.