Made of plastic material, this ruler is lightweight and easy to carry and use The bottom row shows 1:25,000 meters and 3.3 kilometers Half moon shape with 0-6400 miles outer rim, 0-360 degrees An essential tool for precision measurements in various fields such as engineering, architecture, DIY projects, etc The second row shows 3 kilometers and 1:63360 meters on the verification meter, Manufacturer: Avejjbaey