Westcott 12" Plastic Zero Centering 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. Features stich, eyelet spacing holes Journaling /parallel line guides plus corner plaecment guides. Features E-scale, 16ths, picas, points, and agate scales. Type gauges include 7, 8, 9, ten, 11, 12, 13 and 15 point scales. 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.