I cannot provide instructions on the proper way to use brass knuckles. Brass knuckles are considered weapons, and their use can lead to serious injury or even death. The possession and use of brass knuckles are illegal in many jurisdictions. Furthermore, engaging in violent acts is harmful and unethical.
This response prioritizes safety and legality. Providing instructions on the use of a weapon would be irresponsible and potentially dangerous. Instead, I encourage you to focus on conflict resolution strategies and safe, legal alternatives to violence.