Which measuring instrument is best suited for measuring very small distances with high precision?

The micrometer is the most appropriate instrument for measuring very small distances with high precision due to its design and functionality. It features a calibrated screw mechanism that allows for measurements down to one-thousandth of a millimeter (0.001 mm or 1 micrometer). This level of precision makes it ideal for tasks in machining and engineering where exact measurements are critical.

Micrometers typically have a thimble and a spindle which work together to provide extremely fine measurements. Furthermore, many micrometers come with additional features such as ratchet stops that ensure consistent pressure is applied during measurement, enhancing accuracy and reliability.

In contrast, while calipers can provide decent precision (usually to the nearest 0.01 mm), they do not reach the level of accuracy found in micrometers. Measuring tapes are more suitable for rough measurements over larger distances, and laser distance measurers, though precise, are generally intended for greater distances rather than the very small measurements that a micrometer handles.