The Bon Pro Plus 83-255 Bon 83-255 Leaf And Square is a reliable tool for drywall professionals. It is made of durable materials and designed to last through all your projects. The Bon Pro Plus has many features that make it stand out from other tools, including its ability to provide accurate measurements. If you are looking for an affordable yet high quality leaf and square, the Bon Pro Plus will be just what you need on your next project.