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 6105-00-006-4184
NSN 5985-01-574-0756
NSN 6240-01-522-2070
NSN 6135-00-911-9321
NSN 5950-00-974-1464
NSN 6650-01-485-8536
NSN 6135-01-204-8712
NSN 5835-00-794-7500
NSN 6240-00-079-1759
NSN 5945-01-416-0828
NSN 5895-01-212-5639
NSN 6685-01-199-9772