This 12"/30cm Junior drawing and scoring T-square ruler features inch and metric calibrations, and a clear plastic body that makes it easy to underline notes, draw columns, or check the layout of your paperwork. The transparent edges are ideal for inking. A hang hole allows for convenient storage. Westcott drafting and drawing tools are some of the finest products of their kind for students and professionals. Our commitment to meticulous quality and cutting edge innovation in measurement and art materials has earned us an unparalleled reputation.