OLFA Frosted Advantage 6x12 Acrylic Ruler is non-slip for stable and safe cutting. Frosted back with black grid lines for clarity on light- and dark-material. The large bold black numbers are easy to read. The ruler has black grid lines at every inch, dotted black lines mark the half-inch and black tick marks along the solid line mark the quarters and eights. The frosted back grips in place for safe, stable cutting but repositioning for small adjustments. Cut and measure accurate borders, patchwork, strips, and binding. Unique patented Pivot Point angle markings to easily make 15, 30, 45, 60 and 90 degree cuts. For right- and left-handed use. Hole for convenient hanging.