The Seco Quick Change TLV Aluminum Prism Pole 5507-10 is ideal for a variety of surveying projects. This prism pole's inner pole has dual graduations in feet, tenths, and hundredths of a foot and centimeters. The inner adjustable section extends to 7.22 feet and collapses to 4.36 feet. A soft, rubber knob lock tightens and loosens easily to secure this adjustable section with the outer pole. A 5/8 x 11 top thread on the included adapter allows you to mount various prism assemblies of the same thread and its built-in 40-minute level vial makes it possible to quickly level your prism pole at any time. Made of durable, wear-resistant aluminum, this prism pole is built for lasting accuracy and performance.