Liver Shot Automatic Brass Knuckle Karambit Knife - Tophatter's Army Products & Self DefenseThe extended and rounded palm grip also spreads across the attacker's palm the counter force that would otherwise be absorbed primarily by the attacker's fingers, reducing the likelihood of damage to the attacker's fingers. This knuckle has been contoured to fit comfortably in the palm of your hand. The brushed finish makes this item an eye catching piece. Being constructed of zinc aluminum this knuckle is lightweight but still able to make an impact.