A dial depth gauge is a precision measuring tool used to determine the depth of holes, grooves, or recesses in various materials. It features a dial indicator that displays measurements, allowing users to read the depth accurately. The gauge typically has a probe that extends into the hole, providing a direct measurement of depth. These tools are commonly used in machining, woodworking, and metalworking industries. They help ensure that components meet specific design requirements and tolerances. By using a dial depth gauge, professionals can achieve consistent and reliable measurements, which is essential for quality control in manufacturing processes.