Westcott 24" English/Metric Ruler has a zero center to help you find the middle point quickly and accurately by aligning the zero so that the same measurement appears on both sides of zero. It is laminated for durability and features a translucent color to allow for viewing through to the page. Perfect for your drafting and drawing needs. 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.