Billy Russo's Hidden Blade is a special wrist blade used by Billy Russo.
The Hidden Blade was utilized by Billy Russo for both his silent assassinations or as a last minute resort weapon when he had no other option. Russo used the blade to murder Morty Bennett, with Bennett seeing Russo as unarmed and not seeing the blade coming before it was too late. During the Ambush at the Abandoned Warehouse, Russo was disarmed and cornered by Sam Stein, so he waited until Stein got closer to him before using the blade to fatally wound him. When Russo became cornered during his duel with the Punisher, he was able to plunge the blade through the Punisher's arm before using it and another knife to gain the advantage in the fight.