About the OLFA 6" x 12" Frosted Advantage Acrylic Ruler (QR-6x12): The OLFA Frosted Advantage Acrylic Ruler has a frosted acrylic surface that allows the black imprinted numbers to be read effortlessly. No matter what color fabric you're working with, you'll be able to quickly and accurately read your measurements and make your cuts. It features non-slip backing that provides extra stability and safety when cutting. It freely moves over fabrics when lining up, but once you apply pressure it stays securely in place. Our quilting ruler is designed for accuracy and precision with grid lines marked in 1/8", 1/4", 1/2" and 1" increments. It also features compass pivot-point angles for 15, 30, 45, 60, and 90 degree cuts. This textile ruler can be operated by both right and left-handed users. It's perfect for paper crafting and patchwork, finished blocks, borders, bindings, seam allowances, and more. About OLFA: Ever since Yoshio Okada, the founder of OLFA CORPORATION, invented the world's first snap-off blade cutter in 1956, OLFA has been committed to developing practical and safe hand-held cutting tools. OLFA brand blades are made with top quality materials, forged with technologies that stem from traditional sword-making, sharpened with technologies that give a blade life, and ultimately finished with the craftsmanship that brings all of this together. The holders and handles that allow users to gain the full cutting performance of these high-quality blades are designed, developed, and manufactured in Japan and subjected to stringent quality checks throughout the process. OLFA is proud of the unwavering quality that goes into every product it makes.