Plenty of people I know in the self-defense community don’t give brass knuckles lots of attention. There’s a thing to be expounded for a weapon that is so good at doing what it is designed for.
They can not simply be turned around and used against you, and they won’t be mishandled. It needs a small bit of expertise to use if you do not understand how to punch, you cannot use one effectively but it’s still much faster to use than most rods and other weapons. The base line is, if you know the way to punch, you know the way to use knuckle dusters. As an important point, a large amount of self-defense mavens suggest brass knuckles over guns, knives, and other typically used weapons. The concept current goes that when many folks are faced up to with an attacker, they are disinclined to use lethal force. With a brass knuckle it is far easier to choose to do what you have got to in self-defense, knowing that you are intensely doubtful to kill your attacker or cripple him.
Naturally the one difficulty with brass knuckles is that, if you are not a martial-arts expert, it is hard to muster enough force to stop a purposeful attacker. This is the reason why many folks like to use stun guns instead.
When those contacts strike an adversary, they deliver a paralyzing jolt of electricity as well as the force of the punch. That gives you an one-two attack that is really tough to resist. Most assailants will be fully overcome and rendered comatose or confused by it, giving you time to get away.