Drafting and drawing compasses and sets. Dividers and compasses can be used for mathematics, drafting, navigation, and other purposes. We feature only pro-quality Alvin drawing sets, drafting compasses, compass sets, and drafting instruments. Choose the compass set that best meets your specific project and budget. Alvin drafting and drawing compasses are great for both professionals and schools. PLEASE E-MAIL FOR QUANTITY DISCOUNTS.