Function: Brass knuckles are intended to increase the impact of punches by concentrating the force of the blow onto a smaller area, potentially causing more damage to the target.

Legality: The legality of brass knuckles varies widely depending on the jurisdiction. In many places, they are considered prohibited weapons due to their potential for causing serious harm. Possession or use of brass knuckles can result in criminal charges.

Safety Concerns: Brass knuckles are often considered dangerous weapons because they can cause severe injuries or even fatalities when used in altercations. Due to this potential for harm, their use is highly discouraged.

Legal Use: In some areas where brass knuckles are legal, they might be used for legitimate purposes such as self-defense training, martial arts practice, or as collector's items.