A compass and ruler are essential tools for many trades. Before computer-aided design, drafting involved making careful hand-drawings. The first recorded engineering design, an aerial plan for a Babylonian castle, dates back to 2000 B.C. Over the centuries a multitude of technological innovations have improved and eased the engineering process, allowing human ingenuity to reach new heights. These cute drafting tool earrings pay homage to the creativity and effort of those who use them, making a fun engineering inspired piece of jewelry. They are made from a zinc alloy and hung from surgical steel hooks.