The True Plumb is an easy way to test and adjust your rod in seconds. Surveyors across the country have found the True Plumb to be an invaluable quality control device. We're so sure True Plumb is the easiest most accurate way to test and adjust your rod that we guarantee it! Adjusts all brands of prism rods.
16TPL2000 comes with an adapter rod for GPS fixed height rods. It also works with regular prism poles.