The Ruler Pad is a scale ruler, protractor, character size reference, and line width chart all-in-one. The upper right corner has a protrusion that is designed to be an index tab so you can quickly access the page you need even after closing the ring leather binder. The keyhole ring design makes it easy to remove and reposition wherever you like. Use it as a thin pencil board to help write on any irregular surface.Specifications Body / Made of PP resinBody size / H4.3\” W2.4\” (109mm X 62mm)Country of origin / Made in Japan