The Hamsa is a talismanic symbol that people believed to protect them from harm against evil forces. Many early cultures adopted the eye as an icon for their protection, others used Hamsa and so over time the most popular universal symbol became an eye placed in the palm of a hand. Or, in modern times you can just flip evil off.
Only the howlite hamsa hand is available in this listing - the black obsidian finger is available in a separate listing.