Olfa Frosted Advantage 6" x 24" Quilting Ruler - The Essential Frosted acrylic surface allows black imprinted numbers to be read effortlessly over light or dark materials Frosted, glare-free surface is non-slip for extra stability and safety when cutting For right- or left-handed use Designed for accuracy and precision with grid lines marked in a 1/8", 1/4", 1/2" and 1" increments Features a compass with pivot-point angles for 15-, 30-, 45-, 60- and 90-degree cuts