These are ranging rods, which are used in surveying instruments used to mark positions and measure lines in land surveying and construction.
Function: Used for marking station positions and aligning survey lines.
Design: These rods feature alternating colored bands, typically red and white, for high visibility over long distances or in poor weather.
Material: Ranging poles are commonly constructed from durable materials such as metal, wood, or fiberglass.
Accessories: The items are pictured with protective yellow carrying cases for storage and transport.