Scrapbookers and quilters alike will love this ruler. The OLFA® ruler has patented compass pivot-point angle markings. It's a non-slip, lightly frosted clear acrylic rectangular ruler with black markings. It's unique pivot point in the center has angle markings to easily make 15-30-45-60-90 degree cuts. The numbers and guidelines are easy to read. The ruler is marked in a 1-inch grid with 1/2", 1/4", and 1/8" increments. Use this ruler to achieve precise measurements and cutting angles for sewing and quilting.