What Is a Vernier Calliper?
Vernier calipers are a type of measuring device used to measure precise increments between two points. Vernier calipers work best when used between parallel points, their intended design. Due to their precision they can be used across less stable points of reference to a high degree of accuracy. Calipers come in various sizes, but the most common is 6 inches. These tools are not intended to measure large spans.