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Helix Engineers Scale 30cm Ruler
£4.63
The Helix Engineers technical scale ruler has markings of 1:1, 1:10, 1:2, 1:20, 1:5, 1:50, 1:25, and 1:250. 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.
Availability: 3 in stock