A black thread (often called Kala Dhaga in Hindi) is a simple, flexible cord used for both spiritual and practical purposes.
People use it as an energetic shield to ward off the evil eye (nazar), as a tether for amulets, and as a strong, versatile material for jewelry making.
Many wear it as an anklet, bracelet, or necklace to absorb negative energy, jealousy, and bad vibrations.
It is frequently used to tie religious amulets—like a taweez—close to the body.
In Vedic practices, it is associated with Saturn (Shani) and Rahu, and is often tied on specific days (like Saturdays) to bring discipline, focus, and relief from hardships.