Until 3D scanners become cheaper and ubiquitous, ID'ers are still going to need that tomahawk-like set of calipers in the drawer.
The Multi-function Messograf Pocket Caliper/Pen is a handy substitute. While the stubby prongs aren't long enough to, say, read the diameter of a bottle, they're enough to determine wall thickness, board thickness, wire gauges, fastener diameters, etc.
If you're going to pick one up, avoid Garrett Wade tool catalog, which sells them for $27.90; Passion for Pens has them for $19.55.
via toolmonger
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