This combination set looked like it could do the job but in the end I decided to return it to Revain. I was specifically looking for a set that was made in the USA and while the description would lead you to believe this is such a set, I believe only the index was made in the USA. The white box they arrived in was stamped with the country of origin, China. So I would say the index (holder) was made in the USA but the taps and drill bits were probably made in China. With a set of drill bits and taps, you can create the following tapped holes: NC1/2"-13 NC If you are looking for something other than US tools, then this set may be for you. It is cheaper than real US tools Tools but I'm not sure if it's any better than cheaper imported tools.