This twin-use Q-Connect 300mm Ruler lets you measure and plot in both metric and imperial measurements. It features a bevelled edge that provides increased accuracy when measuring by shortening the distance between scale and paper. Sturdy clear acrylic provides durability for frequent use. 300mm ruler for measuring and drawing straight lines Featuring inches on one edge and mm/cm on the other Quality clear plastic construction won't deteriorate Allows you to measure with a certain level of precision Perfect for technical drawing Shatter proof to prevent accidents