A triangular reduction scale for accurate scaling and precision drawing.
- Dimension markings in both centimetres and metres
- Two coloured flutings
- Scales - 1 : 10, 1 : 20, 1 : 25, 1 : 50, 1 : 75, 1 : 100, 1 : 125, 1 : 200, 1 : 250, 1 : 500, 1 : 750, 1 : 1250