Caliper for measuring small distances WordNet 3.0 & Open English WordNet

A micrometer, sometimes known as a micrometer screw gauge, is a device incorporating a calibrated screw widely used for accurate measurement of components in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers. Wikipedia

A measuring tool Wikipedia Disambiguation

Device incorporating a calibrated screw Wikidata

A device used to measure distance very precisely but within a limited range, especially depth, thickness, and diameter. Wiktionary

Instrument. Wiktionary (translation)