These Rugged, Rectangular-Shaped Leveling Rods are made from, corrosion-resistant and non-conductive fiberglass. The rods feature abrasion-resistant coating with special reinforcement fiberglass ribs to stop breakage and add stability. Easy-to-read graduations and a special measuring scale on the backside permit users to read height at eye level. Rods are equipped with reliable and long lasting spring loaded Delrin® buttons. All rods come with a carrying case.