This patented lip-edge ruler works like a T-square against the edge of an Olfa mat. There are two 45 degree biased lines and two 60 degree biased lines along with 1/4'' perpendicular lines. The first 5'' of the ruler is a detailed mini ruler. O'lipfa rulers have gold foil marking which are easily vis ible against virtually all colors and patterns. Packaged in a poly bag with header.