This ALVIN Adjustable 45° Triangle TRU-ANGLE 10 X 9  is a reliable drafting tool for any engineering or science & medicine enthusiast. Made in the United States, it boasts a brand-quality of Alvin and a model of 108C. The item has not been modified and is in great shape for all your drafting needs. Its size of 10 X 9 makes it a perfect fit for any project, and its 45° angle allows for precise and accurate measurements. This item is a must-have for any collector or professional who values quality and precision in their work.