SQUARE LAYOUT TOOL: Johnson Level Square has a lightweight and durable Structo-Cast molded frame; as well as permanent molded graduations for quick and easy measurements. It gets the job done accurately and easily. HANDY MARKERS: This USA-made carpenter square features handy markings for measuring 2×4 board measurements of 1-1/2"; 3"; and 3-1/2". It's brilliant; eye-catching hue makes it simple to locate in the toolkit. SIMPLIFIES STAIR LAYOUT: The Johnny Square with integrated distance and angle scales allows for quick and accurate marking of the cut lines on stringers. It also has scales for cutting hip; valley; and jack rafters. APPLICATIONS: This measuring tool with a thick edge is an ideal saw guide; and can be used directly against the square for cross-cuts or angled cuts with an engraved protractor scale. The scribing notches allow for the indirect creation of a saw cut line for rip cuts. PRODUCT SPECIFICATIONS: This 7’’ rafter square measures ‎7 × 5 × 1 inches and weighs approximately 2.08 ounces (78.62 g). This orange-colored tool is made of high-grade plastic for durability.