Triangular section, metric 30cm / 12” rule.
Scale rulers are used by architects and engineers to calculate dimensions in plans, reducing the need for time-consuming and complicated equations. Made from durable plastic, with bevelled edges for precision drawing.
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.