Micrometers are precision instruments used for extremely accurate measurement of small distances, usually thickness or diameters. They consist of a calibrated screw and a spindle that moves to measure the object between the spindle and the anvil. Micrometers come in various types, such as external, internal, and depth, each designed for specific measurements. The readings are usually displayed in millimeters or inches, making them essential tools in machining, mechanical engineering, and quality control processes.
