A convenient, pocket-sized, six scale triangular rule, invaluable for working with scale drawings.
The 1:250 and 1:500 edges are also handy for map reading applications, giving subdivisions of a grid square or 'as the crow flies' measurements down to 20m.
Cross section: 16×16×16mm
● Anodised aluminum.
Reduction Scale 1/100, 1/200, 1/250, 1/300, 1/500, 1/600