Depth gauges are tools used to measure the depth of holes, grooves, or other surfaces. They typically consist of a graduated scale and a probe that can be inserted into the material being measured. Depth gauges are commonly used in various fields, including woodworking, metalworking, and construction, to ensure precision in measurements. These instruments come in different types, such as digital depth gauges and dial depth gauges, each offering unique features for accuracy and ease of use. By providing reliable depth measurements, depth gauges help professionals maintain quality and consistency in their work.