The Empire 16 in. X 24 in. TRUE BLUE Laser Etched Framing Square (1190) features permanent high-visibility laser markings that won't wear after heavy use on the job site. The square features ARC-SCRIBE which gives users the best solution for marking radii on job site materials. The durable anodized lightweight aluminum framing square will not rust or corrode and features laser etched graduations at 1/8 in., 1/10 in., 1/12 in., and 1/16 in. for superior readability in any light condition.