with a Vernier scale that allows the reading of fractions of its graduation. It will typically have two sets of jaws for both internal and external measurements, and an extending probe for depth ...

Both calipers and micrometers often include vernier scales, which are read by finding alignments between graduations on two graduated scales. Gaging devices, such as gage blocks, plug gages, ring ...

They are available in Vernier scale, digital and dial variations. Micrometers provide precise, quantitative measurements of a product's or component's attributes such as thickness, depth, height, ...