The Staedtler Mars 987 19-31 Triangular Scale Ruler is a high-quality drafting tool. This precision scale ruler is designed for use by architects, engineers, and drafters, providing accurate measurements and angles for detailed drawings and designs. With a time period of manufacture starting in the 1930s, this ruler is a reliable and durable option for professionals in the field of drafting and engineering. Its unique triangular shape allows for easy handling and precise measurements, making it a valuable tool for precise calculations and designs.
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