1、Ruler Specification: 3 meter double scale tower ruler, with double sides telescopic design to meet more measurement needs, and facilitate storage and carrying. 2、High Efficiency: This telescopic measuring ruler has clear scales and bright colors, ensuring accurate readings and greatly improving measurement efficiency. 3、Aluminium Alloy: The measuring ruler is made of aluminum alloy, weather resistance and corrosion resistance, the PC button can lock each part when extended. 4、With Bubble Level: The height pole is equipped with a bubble level, which helps improve the accuracy of the leveling function, suitable for use with optical measuring instruments. 5、Applications: This double scale ruler is suitable for leveling, used for construction and optical measurements, as well as reading altitude changes during on site operations.