OLFA 1071831 QR-1x12 1-Inch x 12-Inch Frosted Advantage Acrylic Ruler Designed for right and left-handed users Ideal for simple patchwork, finished blocks, borders and bindings Special marked grid lines for accuracy and precision Frosted backing allows for easy reading on dark, light or patterned materials Designed for right and left-handed users Ideal for simple patchwork, finished blocks, borders and bindings 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