Jack Amulet
A "jack" is a powerful Amulet used by practitioners of folk magick in the southern regions of the United States.

it consists of a piece of red flannel shaped like a human finger and stuffed with coal dust and dirt, and contains a silver dime.

After being charged with magickal power by an incantation invoking the presence and help of the old gods, a jack Amulet can be worn or carried to prevent a traveler from losing his or her way.