Rhino Rulers® have an easy-to-close folding joint design to help you get accurate measurements for all your Masonry projects. This measuring tool is made of a washable fiberglass material that is easy to clean and is marked with distinct, permanent, weather resistant scales to quickly measure on the job. This scale is available in four styles. Choose between the Engineer’s, Brick, Oversized Brick, or Mason’s Modular ruler style to suit your needs.