This set of four triangular drafting scale rulers is a must-have for any architectural engineer or draftsman. Made by renowned brands such as Staedtler and Koh-I-Noor, these rulers are of high quality and are made to last. The rulers are perfect for creating accurate measurements and drawings.

The rulers are made in the United States and china and have not been modified. They are ideal for use in the field of science and medicine, specifically in engineering and drafting tools. These rulers are a great addition to any collection and are a practical tool for everyday use.

Model number

KOH-I-NOOR 3272 architect us standard

KOH-I-NOOR 3274 engineer us standard

KOH-I-NOOR 3279 metric

Staedtler 987 19-31 architect