Thread Size Checker - Review

I have a wall mounted one.
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I have both an SAE and metric screw checker plates.

I typically use a caliper and thread pitch gauges (if needed). The pitch gauges are kind of hard to read if comparing threads that are close in number; I had to sort through some 1/8" NPT and 1/8" BSPT fittings and the difference between 27tpi and 28tpi (respectively) is very subtle.
 
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