The Mitutoyo 129-131 Depth Micrometer is a vintage and excellent tool designed for measuring depths between 0 and 4 inches with a resolution of 0.00100 inches. With a mechanical reading mechanism, this depth micrometer is a reliable choice for precision measurements in metalworking inspection and CNC manufacturing applications. The Mitutoyo brand is known for its quality and accuracy, making this micrometer a valuable asset for professionals in the industrial sector.