The red agates protect the primary chakra of our human body, which usually called the root chakra. A place located in the coccyx region, usually on the perineum and genitals. Red Agates Promotes Safety, grounding, and vitality. Also, influence the other points of energy within the body. 
It is used for the purpose of full resetting and reorganizing feelings. You'll recall the original purpose and will take a new step. Red Eye Agate is a gemstone with the power to avoid danger. It has been useful as an amulet to prevent from evils since ancient times.