Frames entire roof using One Number. Ideal for trim cabinets, and all woodwork. Full 0 deg. to 90 deg. scale for measuring angles, and full rafter scales. Use as a handy saw guide for cutting angles with electric or hand saws. Has features of framing, miter and protractor squares. The 8" Speedlite Square is formed from lightweight, high-impact structural composite, and is available in matte gray, high-visibility yellow and high-visibility orange. It's basically the same as the one and only Speed Square but is also great for use with siding and other delicate materials, since it won't mar soft finishes. Plus, its 8" size means it's ideal for marking cuts in 8" siding. Look for the Diamond.