This easy to use ruler takes the math out of cutting half-square and quarter-square triangles. It lets you cut both types of triangles from strips rather than by cutting squares diagonally into triangles. This is a special ruler for scrap quilts because you use strips of even-inch or half-inch widths. You can cut squares from the same strips that you used for triangles. Cut perfect triangle from strips measuring 1-inch to 5-inch in width. Ruler features an acrylic construction with easy to follow black and yellow markings. Made in USA.