The 'roundtuit' showed up telling me it's time to get a thread gauge.  
The problem is that I don't know which of the several types will best 
fit my needs.  Of course the obvious answer is that I */need /*one of 
each, but SWMBO is watching a bit too closely of late; so I seek advice 
and wise counsel from the galooterati here assembled.

I want to be able to measure thread pitch and cut type in screws and 
bolts.  i found this type 
(https://www.amazon.com/Glarks-Stainless-Cutting-America-Whitworth/dp/B
07PDRB7TJ/ref=sr_1_9?keywords=thread+gauge&qid=1557695843&s=gateway&sr=8-9">http
s://www.amazon.com/Glarks-Stainless-Cutting-America-Whitworth/dp/B07PDRB7TJ/ref=
sr_1_9?keywords=thread+gauge&qid=1557695843&s=gateway&sr=8-9)
and this type 
(https://www.amazon.com/OSOF-Multi-Purpose-Cutting-Measuring-Whitworth/
dp/B07LCDNF6T/ref=sr_1_13?keywords=thread+gauge&qid=1557695901&s=gateway&sr=8-13
">https://www.amazon.com/OSOF-Multi-Purpose-Cutting-Measuring-Whitworth/dp/B07LC
DNF6T/ref=sr_1_13?keywords=thread+gauge&qid=1557695901&s=gateway&sr=8-13)
on Amazon.  Is one better than the other, and, if so, why?  Should I 
look for yet another type?

I have a screw/bolt gauge for determining diameter and want to be able 
to measure thread pitch in order to match nuts to bolts correctly and to 
choose screw types for different jobs.

Thanks in advance.
Bob Hutchins
Temple, TX, USA