The Swanson Speedlite Siding Square is formed from lightweight and high-impact structural composite, and is available in matte gray, high-visibility yellow and high-visibility orange. The heavy-duty siding square is great for use with siding and other delicate materials. This siding square won't mar soft finishes and the 8 in. size means it's ideal for marking cuts in 8 in. siding. Great for use with siding and other delicate materials Siding square won't mar soft finishes 8 in. size means it's ideal for marking cuts in 8 in. siding Formed from lightweight and high-impact structural composite