Premium MaterialThe Land Navigation Protractor is made of plastic material, which is strong and waterproof and can be used for a long time. Coordinate Grid ReaderThe Drawing Ruler is calibrated in degrees and mils, meters and yards, for greater versatility. ApplicationCoordinate reader tool is suitable for surveying, technical training, reading, land navigation, coordinate reading, drawing, camping, engineering, architecture, aviation Easy to UseCoordinate Scale, transparent design, clear scale, easy to read, is a great professional tool Package ListYou will receive 1 reading protractor. Specification: Material: Plastic Package Includes: 1x Land Navigation Protractor(2 Pack) Note: Please allow slightly errors 1-2cm differences due to manual measurement.