At last, a 6' folding rule that works and stands up to rugged outdoor use. Engraved graduations that won't wear or scratch off. Waterproof, NO swelling, peeling or rotting. Positive locking hinge cam, no more bad measurements from loose hinges. Made of ABS Fiber reinforced plastic, so they're washable. Lifespan is 3 times that of wooden rulers. Comes in 10ths, (inches and Metric not shown).