A micrometer is an essential tool for taking precise measurements. It has a precision of 0.01 mm and if you ever aspire to make something with tight tolerance you will probably need to use it. We will...A micrometer is an essential tool for taking precise measurements. It has a precision of 0.01 mm and if you ever aspire to make something with tight tolerance you will probably need to use it. We will have a look at how to use a traditional analog micrometer and how to read the dimension correctly.