NTB01 Tribrach without Optical Plummet 40-6607 The NR18165 has double screws

The NR18165 has double screws and a durable plastic molding shape that keeps the housing together and is built to last

This wheel is only compatible with the Keson MP301 Measuring Wheel

magnetic bracket

ChrisNik also offers a 3 Feet Extension Arm (1736ARM - Sold Separately) if there is a need for a longer reach on larger diameter manholes that the included 2' cannot easily access

in case something should happen to the original wheel

NTB01 Tribrach without Optical Plummet 40-6607 The NR18165 has double screwsThe NWI NTB01 Tribrach without Optical Plummet secures optical and surveying equipment and ensures accurate measurements. This tribrach features a universal 5 8" x 11 screw base plate plus a circular leveling sensitivity of 10 ft. Its robust construction provides long lasting durability and performance.