From The Stargate Omnipedia


An intricate ring used by Ashrak assassins to inflict pain and death on their subjects. The weapon is also possessed by Sokar. The ring itself is three-sided, and can fit on two middle fingers.


In the Line of Duty - Jolinar of Malkshur, in the body of Samantha Carter, is tortured to death by the hara'kesh, by the order of the System Lords.
Serpent's Song - Samantha Carter believes Apophis was tortured by the hara'kesh at the hands of Sokar.