I think the title and picture sums it up well. Sometimes accidents happen and I happened to knock over my well organized box of M3 socket head screws (again) and sometimes it's difficult for me to tell the difference between a 10mm and 12mm, etc. So I made this handy jig to help me re-organize in a timely fashion without having the calipers in one hand.

Design time: 30 Minutes
Print Time: 1 hour
Time saved in the future: Priceless

Print instructions

Paramount PLA 200/60
Prusa Slicer 0.2 quality

YMMV