Black Obsidian is a wise and grounded stone. It has a warmth to it that comes from the depths of Pachamama's womb. 
 
It has been said this Black Obsidian Chakra tool is great for direct extraction and transmutation of deeply seeded, "stuck" energy.
That said, stones work differently with different practitioners, so I encourage you to select stones based on what calls to you.
 
These stones were created to lay on the Chakras. They are used to pull out anything holding, to release stuck energy~ Transmutation to Light.
 
They are made by hand, with love.