The Empire® 16 in. x 24 in. True Blue® laser etched framing square (E1190) has permanent high-visibility laser markings that won't wear after heavy use. The square has ARC-SCRIBE™ which is the best solution for marking radii. The durable aNdized lightweight aluminum framing square will Nt 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.