What type of measurement tool is a micrometer?

A micrometer is specifically designed for measuring small distances or thicknesses with a very high degree of precision. It typically has a screw mechanism that allows for fine adjustments and measurements in increments of one thousandth of an inch or one hundredth of a millimeter, making it ideal for applications where accuracy is critical. This precision makes it particularly useful in machining and engineering contexts, where small variations can significantly impact performance or fit.

The other options describe tools that either measure larger distances, angles, or perform different types of measurements. Thus, they do not align with the micrometer's primary purpose and capabilities. Understanding the specific strengths and applications of a micrometer helps in selecting the right tool for precise measurements in various machining tasks.