Screw sizer with ruler

(updated 05/09/2020)

This improvement over my original design combines an imperial screw diameter sizer along with a ruler, so you can sort most of your loose imperial screws without needing a second tool. I know I should have included the ruler component when I was drafting the original version, but the idea didn't occur to me until quite later.

As with the original tool, use is simple. If the shaft of the screw doesn't easily swipe unimpeded through the gap--or alternately, if it does