Disk micrometers are used across a variety of measurement contexts, often in circumstances when other micrometer designs are not appropriate. Perhaps the most common use of the disk micrometer is to determine the root tangent length of a gear or helical part. The thin, but wide discs of the disk micrometer are able to slide easily into more narrow areas and are able to create an evenly dispersed measurement surface across a part. These capabilities make the disk micrometer very useful when measuring recessed parts or the thickness of more easily damaged materials. The disk micrometer is used when measuring the distance on a spur or gear. These handy tools are also perfect for measuring the thickness of paper, rubber sheets, film, metal sheets, and more.