1、12 Inch Combo Square: 12 inch heavy duty combination square marked with accurate inch and cm graduation in 1/16, 1/8, and 1/32 inch. Spring loaded bolt to assure accuracy. Scriber and level for accuracy. 2、Multi Purpose Square Tool: This combination square is equipped with a ruler, from carpentry to stone masonry to metalworking, this measuring ruler comes in useful for a variety of project and tool setup applications. It also functions as a straightedge, an adjustable try square, a miter square, a marking gauge, and a depth gauge for machinists. 3、Accurate Measurements: Designed for professional woodworkers and DIY enthusiasts, this combination square provides high accuracy measurement for accurate cutting, marking, and layout tasks. 4、Durability: Constructed from sturdy alloy steel, ABS, this combo square is built to last. It offers high strength and is resistant to damage and cracking, ensuring long lasting accuracy and reliability. 5、Wide Application: This combination square is great for marking 45 and 90 degree angles, and can also function as a handy gauge for transferring accuracy angles and other measurements, essential for use in your rafter, deck, stair and roofing projects, and in other general carpentry operations.