Westcott 10ths/Metric Beveled Ruler, 12-Inch/30cm is laminated for durability and features a translucent color to allow for viewing through to the page. Zero center helps you find the middle point quickly and accurately by aligning the zero so that the same measurement appears on both sides of zero. Westcott Drafting & 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 an unparalleled reputation.