Initially I used the wrong name, "digital micrometers". These are digital calipers, and the Pittsburgh brand can be found on sale at Harbor Freight for about $10. The Mitutoyo is currently selling for $115 on Amazon.

Edit almost four years later: I still own these calipers, although the thumb wheel has fallen off and it randomly adds 0.200 every once in a while. They're still used for doing the dirty work I don't want to subject the Mitutoyo to. And it's till on the original battery.

Another take on cheap but usable tooling for hobbyists by one of the best YouTube machinists, Stefan Gotteswinter: [ Ссылка ]

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