A handy fan ruler with reduction scales that can be used for architecture and engineering. The rulers are precision printed on thin flexible plastic and are housed within a hard-wearing leather cover.
- Length 19.3cm
- 1:10, 1:15, 1:20, 1:25, 1:30, 1:33 1/3, 1:40, 1:50, 1:75, 1:125