Prison Knife

The Prison Knife is a melee weapon used in the mission "Vorkuta" in Call of Duty: Black Ops. It appears to be a piece of glass with black tape around one end, similar to a 'shank' or 'shiv'. After Mason acquires another weapon, the prison knife is no longer equipped, and is only used by pressing the melee button. Blood can be seen on the blade, probably from stabbing the prison guard. However, this could also just be rust. Oddly, heads can be cut off with this knife even though it is a makeshift knife.

Trivia

 * It is unknown why Mason did not kill the prison guard with the knife, instead opting to knock the guard unconscious (but may have killed him, due to the sharp hit and impact on a rock floor) with a rock.