The Sokkia 8.5-Foot Aluminum Prism Pole 724200 has alternating red and white markings with dual graduations in hundredths of a foot and centimeters. Surveying professionals can extend this prism pole's two sections to 8.5 feet and collapse it to 5 feet. There is a 5/8 x 11-inch thread on top and an adjustable tip on the bottom. A convenient twist knob made of soft rubber serves as a lock by tightening or loosening for you to secure or adjust the length of the prism pole, respectively. A built-in level vial with 40-minute sensitivity even makes it possible to level your prism pole while on the job. This prism pole is constructed of lightweight and wear-resistant aluminum. A carrying case is also included.