Thank you for viewing. This is a set of convex and concave Pa Kua mirrors. Pa Kua mirrors are a representative item in Chinese Feng Shui, believed to protect the house from evil spirits. They are used to prevent negative energy from entering the house, such as when there is a utility pole in front of the house, the house is at the end of a T-intersection, the corner of a nearby building is pointing towards the house, or near high-voltage power lines, cemeteries, or hospitals. Back side: Protects from all evil threats, brings good luck, improves fortune, etc. Convex mirror (convex): Installed facing places where negative energy is likely to come from, such as the entrance, windows, or the end of a road, to repel bad luck from the outside. Concave mirror (concave): Installed inside the entrance, etc., in places where you want to bring in good luck, to attract good fortune. Good luck: The octagon symbolizes prosperity and happiness, and is a powerful shape in Feng Shui to ward off evil spirits. This item was sold in a shop. There is a dent in the convex part, but it is said that there is no problem with the effect. Please refrain from purchasing if you are concerned. Thank you very much. m(_ _)m