Brass Knuckles
Brass Knuckles are metal devices with holes punched through them, and are thus intended to be worn on the fingers while the fist is clenched. They are meant to increase the force of a punch, while minimizing the initial force needed to throw an arm, and when used properly, they create massive damage against an intended target. Brass Knuckles have been available in Grand Theft Auto since Vice City, and have been available on every subsequent game except GTA IV.