The Dovetail Square Set by Crown Tools in the Windsor design with brass rivets is a premium measuring tool made of steel. It features a portable design, measurement of area, and rust-resistant properties. This set includes a new seals package, making it a reliable choice for various home and workshop projects. The product comes with a manufacturer's warranty and is designed to meet standard measurement requirements in the US. Additionally, it is important to note that this product may contain lead, a substance known to the State of California to cause cancer and reproductive harm. It should not come in contact with food and drinking water, and it is recommended to wash your hands with soap and water after using.