Multi-Size Survey Pole Options: Choose from 200 cm 300 cm or 500 cm lengths of this aluminum survey pole featuring 5/3/2-section designs for flexible use. The free-splicing structure makes this measuring rod for diverse surveying and engineering tasks Alloy Measuring Rod: Crafted from thickened aluminum alloy this survey rod boasts upgraded rivets for stable connection. Its 28mm diameter ensures sturdiness while high-visibility markings guarantee clear reading on site Easy Assembly & Operation: The threaded detachable design allows quick installation and removal of this surveying range pole. No complex tools are needed making this centering rod convenient for on-site surveyors and workers Clear Markings: Equipped with 20cm segmented markings this measuring rod enables quick and accurate measurements. The sharp tip ensures stable placement perfect for railway road and bridge construction surveys Wide Application Scenes: Suitable for railway construction engineering surveying road & bridge projects and building construction this insulated measuring pole meets professional demands of various civil engineering and survey scenarios