Brass knuckles are a type of weapon designed to fit over the knuckles of a person's hand. They are typically made of metal, such as brass or steel, and are used to enhance the force of a punch. The design allows the user to deliver more powerful strikes, making them potentially dangerous in physical confrontations. While brass knuckles are often associated with street fighting and self-defense, their legality varies by location. In some places, they are considered illegal weapons, while in others, they may be permitted for personal protection. Their use can lead to serious injuries and legal consequences, making them a controversial item.