The Rotring H382 Tri-Scale Ruler is a precision tool designed for technical drawing, engineering, and architectural work. Measuring 30cm in length and constructed from durable aluminium, this triangular scale provides a solid and stable surface for accurate drafting. It features colour-coded inserts that allow for quick and easy scale identification, assisting in efficient workflow management. This ruler includes a comprehensive range of metric markings, including 1:1, 1:2, 1:5, 1:20, 1:50, 1:100, 1:200, 1:500, 1:1000, 1:1250, and 1:2500 scales. To protect the integrity of the markings and ensure long-term usability, it is supplied in a protective hard plastic storage case.