Helix 300mm Triangular Scale Ruler

Triangular rule featuring high grade print and 3 colour faces.

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.

Ideal for professional usage.

Cm, mm and scale.