The Seco 5198-163 is an adjustable offset bar which can be used with total stations and prism poles to help get accurate elevation measurements in hard-to-reach places.
Constructed of anodized 1/2 inch thick aluminum, iIt is designed for use with any standard survey pole.

The 5198-163 features an adjustable centerline, 48.7 to 30.4 cm in 6 cm increments.

The offset bar is ideal to measure sewer inverts down manholes or odd surfaces on bridges and construction sites.