A depth micrometer is a precision measuring tool used to determine the depth of holes, slots, or recesses. It consists of a calibrated rod with a micrometer screw that allows for fine adjustments, ensuring accurate measurements. Depth micrometers are commonly used in engineering and manufacturing to ensure parts meet specific design specifications. These tools typically feature a flat base that rests on the surface of the workpiece, providing stability during measurement. The depth micrometer can measure depths in millimeters or inches, making it versatile for various applications. They are essential for quality control in industries such as automotive and aerospace.