Westcott 10ths/Metric Beveled Ruler, 12-Inch/30cm (B-65) Calibrated in 10ths to the inch on one side and centimeters on the other. Beveled edges. Zero centering scale. Laminated for durability. Translucent color allowing for viewing through to the page. Zero centering feature finds the center point quickly and accurately by aligning the zero. Perfect for your drafting and drawing needs.