new pads = new rotors? A rule?

[Tool Pants]

I have a vernier caliper. But once I bought a digital caliper I did not use the old one anymore.

Also have an old micrometer that you look at the numbers on the barrel. Needed that years ago to measure valve shims. Now have a digital micrometer, so I don't use the old one anymore.

So I have worked in all the words.