OLFA 1071798 QR-6S 6-1/2-Inch Square Frosted Advantage Acrylic Ruler Designed for right and left-handed users Great for squaring up corners, and cutting patchwork and miniature quilts Special marked grid lines for accuracy and precision Frosted backing allows for easy reading on dark, light or patterned materials Non-slip features are manufactured into the ruler and will not wear off over time