Triangular Scale - 12" Architect / Engineering Hallow Core Aluminum

Easy to Use - Sharp, easy-to-read graduations divided into 10, 30, 40, and 50 parts to the inch for precise engineering measurements and various types of projects Multipurpose Ruler - Designed for architect, engineer, and mechanical draftsman projects. Great for students, hobbyists, beginners and professionals alike. Durable, Premium Material - Constructed of aluminum, this hollow triangular scale is made lightweight and long-lasting, so you can use it for many projects to come. Precision Design - Designed for accurate and reliable measurements, the photo anodized calibrations and consistently straight edges make every project easy and accurate. A Professional's Choice - Alvin has been the professional's choice for drafting tools and drawing supplies for over half a century. Since 1950, we have brought quality and value to our customers. Proudly Made in Poland