Rapid Metric Screw Measuring Tool (M2-M5, up to 50mm)

Measure those fasteners, and fast! A shorter remix of Boogie's remix of Sneaks' execellent Screw Measuring Tool. Free 3D print model by fivesixzero on Printables — 14,320 likes, 33,407 downloads. License: Creative Commons — Attribution — Noncommercial — Share Alike.

You use the tool on its own site. We only track it.