Constructed of tough nylon, this 6′ rule is reinforced with glass fibers for added durability. Resistant to weather, abrasion, and most chemicals. Positive locking joints and stainless steel spring hinges for added strength. Measurements are marked and engraved on both sides and edges, graduated to 1/16″. Black markings on yellow, with red stud center markings every 16 inches. Available in both inside and outside reading models.