A small heavy weight with some means of attaching a line at one end. It is used for finding the vertical or perpendicular line to a horizontal plane.
NSN 6610-00-881-1189
NSN 5915-00-130-6562
NSN 7035-01-127-9019
NSN 5925-01-441-9248
NSN 6220-00-192-1164
NSN 5996-01-469-6479
NSN 2925-01-547-4565
NSN 5950-00-824-9198
NSN 6135-00-284-1406
NSN 6105-01-590-8972
NSN 6105-01-215-3350
NSN 5925-00-122-3247