NAD01 Tribrach Adapter with Optical Plummet TS25867 It also comes with adjustable

It also comes with adjustable audio tone indicator for additional interface

it shows the resultant compound slope to use and the proper compound angle the laser should be aimed at

Clear Optics and Stadia Lines

It also easily works in and converts in between units of measurement with just a touch of a button

NAD01 Tribrach Adapter with Optical Plummet TS25867 It also comes with adjustableThe NWI NAD01Tribrach Adapter with Optical Plummet secures optical and surveying equipment and ensures accurate measurements. This tribrach adapter features a universal 5 8" x 11 screw base plate. Its robust construction provides long lasting durability and performance.