I offered some comments that relate to gaging problems in the last column but thought it would be worth giving measuring instruments the same treatment.
In general terms, fixed limit gages are used to ensure parts made within prescribed limits will assemble. When it comes to actual size measurements, a lot of additional factors come into play one or more of which can indicate that what appears to be the best instrument for the job won’t work well at all. Here’s a list of some of the factors and/or questions you need the answers to in order to make a good choice.