This Swiss-made ETALON Outside Micrometer features a locking mechanism and carbide tips for precise and accurate measurements. With a range of 1"-2", it is perfect for measuring small objects in various industries. Its mechanical reading and minimum/maximum measurement specifications make it an ideal tool for metalworking inspection and measurement. The brand name ETALON ensures top-notch quality and durability. This micrometer is an excellent addition to any toolbox or workshop. I know nothing about this. I have 3 micrometers for sale. Will bundle if interested. Do not know if it works.