This vintage L.S. Starrett Co. #449 blade depth micrometer is a must-have for any metalworking enthusiast or professional. Made in the United States, this depth micrometer has a maximum measurement of 1 inch and a minimum measurement of 0 inches, with a resolution of 0.00100 inches. The micrometer type is a mechanical reading, making it easy to use and read. The cased design adds durability and protection to the instrument, making it a long-lasting addition to your collection or workshop. This micrometer is perfect for measuring the depth of blades, knives, and other cutting tools. It's an essential tool for anyone in the metalworking industry or anyone who enjoys DIY projects.