Hole Gauge

When you design a hole in a project, it never seems to print the same size as you designed it. It is always a little smaller. I was a making holder for my tiny hex keys (or L key or Allen wrench). So I made this hole gauge to help figure out how big to make the holes, so it will fit. It starts with 1mm and gets 0.1 mm bigger for each hole. See the attached diagram.