The business end of a Vernier caliper. The Vernier scale is on the lower part of the sliding jaw. A Vernier caliper is a graduated sliding clamp usually over 150mm long, with a Vernier scale that ...

there’s a Mitutoyo vernier caliper. It’s the base model with a proper vernier scale, but it’s beautifully made, and it’s enjoyable to see younger hardware hackers puzzle over how to use it.