Finbullet Trigonometer/Protractor 300mm

The handy triangulation / ratio ruler has pre-converted measurements for six different scales: 1:20, 1:25, 1:50, 1:100, 1:125, 1:400.

The length of the ruler is 300 mm.

Suitable for measuring floor plans, maps, etc

Material: aluminum.
Scales: 1:20, 1:25, 1:50, 1:100, 1:125, 1:400.