SOLID METAL 30CM SCALE RULER 1:20-1:125 Architect Drawing Measure Aluminium 12"
30cm / 12" Solid one piece aluminium construction - Precision made
Commonly used by architects and design engineers
Also use to scale up drawings of components
Ruler has a different scale on each of its 6 sides:
1:20
1:25
1:50
1:75
1:100
1:125