Brass knuckles are a simple way to increase one's hand-to-hand effectiveness. While the increased mass of the implements increases the force of the blow, the biggest benefit is the protection and extra hardness it offers to the knuckles, allowing one to make full-force, hollywood-style blows, without breaking one's fingers or dissipating energy in soft flesh.

Unfortunately, they're unwieldy and get in the way of everyday activities. At the same time, they're tricky to put on, at least as compared to just balling up your fist and smacking someone.

Insert Custard Knuckles. These gloves have sealed pouches over the backs of the fingers, filled with custard or a suitable substitute (i.e. cornstarch and water). Under typical use, the custard flows freely, without inhibiting dexterity. Upon a sudden blow, the custard forms a hard, protective shell, simultaneously protecting the knuckles and increasing the damage of the blow.

Can also double as emergency food rations in combat situations.