While building my house, I had all the contractors compare their measuring tapes, start of day. I was surprised how "off" some were. Cause a 16th here and there adds up. I probably have 9 or 10 measuring tapes and measuring systems. And they don't entirely match to the same 16th.

The folding rods were useless, for finish work, and I have had many of those.

So I bought 6, quality, measuring tapes, all from the same company, and that is what the contractors were required to use. One standard. And that worked out. I guess there is an old saying that, what the Framers messed up, will be corrected by the Dry Wall crew, and what the Dry Wall Crew messed up will be corrected by Finish People, and what the Finish people can't fix can some how be fixed by the paint crew.