The Mitutoyo 128-101 is a depth gauge screw for precise depth measurement applications with a fixed immersion range of 0-25 mm. This precision measuring instrument features a measuring rod with a diameter of 4 mm, ensuring stable and accurate measurements across the entire measurement range. The depth gauge screw integrates a ratchet stop mechanism for consistent measuring force and repeatable results, as well as a measurement lock to secure the readings during use. Available as a model equipped with an HM measuring rod, this instrument meets the high accuracy and reliability standards of the Mitutoyo brand. The construction emphasizes durability through high-quality materials that withstand regular use in industrial and workshop environments. With easy operation and a clear measurement scale, this depth gauge screw is suitable for various applications requiring precise depth measurements in manufacturing, quality control, and mechanical engineering. The design focuses on ergonomic handling and user-friendliness while maintaining consistent measurement precision. The measurement range of 0-25 mm covers common depth measurement requirements, and the fixed immersion depth ensures consistent measurement positioning. This model represents the ongoing development of precision measuring tools by a manufacturer known for quality instrumentation. The components of the depth gauge screw are designed for calibration stability over extended periods of use, and the overall design prioritizes functional performance and long-term reliability. Careful handling and storage are recommended to maintain measurement accuracy, and users should check before use that the instrument meets their specific application requirements. This measuring tool is delivered as a single unit and is ready for immediate use in measurement processes where precise depth determination is essential.