This is a balance. Depending on the platform, there are silver and gold balances. The middle beam supports two arms, and the two arms respectively support a plate. It is made by the principle of lever and used to measure the weight of objects. In Western culture, the balance represents justice, because "everyone is equal by the law." The goddess Themis in ancient Greek mythology is a symbol of law and justice. She holds a balance in her hand. It also contains the meaning of Libra
♎, balance, weight, and judgment.