Adopt material, this ruler is and lightweight, making it easily to carry and use. An essential tool for precise measurements in various field, such as engineering, architecture, and projects. Half moon shaped, with an outer edges of 0-6400miles and 0-360degrees. The second line reads 3 kilometers at the verification meter and 1:63360meters respectively. Bottom line reads 1:25000meters and 3.3kilometers respectively., Manufacturer: Mllepjdh