A simple, low-level, unarmed weapon in Fallout 3. These are quickly replaced with the more superior and equally common spiked knuckles or can simply be carried for weaker enemies, (such as radroaches, mole rats, etc.), for those who don't wish to expend ammunition.
Brass knuckles can successfully strike about 667 times from full condition before breaking.
Steel knuckles - Slightly stronger than the regular brass knuckles, the steel knuckles only use 14 AP per V.A.T.S. swing.