Double : Equipped with (mm) and (inch) double scale, convenient for different users' usage habits. The maximums measurement length is 150mm, suitable for precise measurement of most small items. Crafted from materials, lightweight and rusts resistant, suitable for long-time use. The cursors part is reasonably to provide more accurate readings, ensuring accurate and practical measurement result. With a small size and easy portability, it can be easily placed in a backpacks or pocket, making it perfect for students and enthusiasts to use.