Colour-coded triangular scale rule with divisions which are clear and accurate. An essential piece of equipment for field draughtsmen and illustrators, whether in the field or in the drawing office. Useful to scale off maps and plans for all archaeologists

The ruler comes with 12 scale factors

1:1, 1:10
1:2, 1:20
1:5, 1:50
1:100, 1:200
1:500, 1:1000
1:1250, 1:2500