K93X70/K93070
This Helix triangular ruler is a stylish scale ruler suitable for professional use featuring high grade print and 3 colour coded faces. Scale rulers are used by architects and engineers to calculate dimension in a blue print or building plan without the use of time-consuming and complicated math equations.
- Metric and scale graduations
- Scales featured: 1:1, 1:10, 1:2, 1:20, 1:5, 1:50, 1:100, 1:200, 1:500, 1:1000, 1:1250, 1:2500