The Knife, also known as the Butterfly Knife or Balisong, is the default melee weapon for the Spy. It is a foldable butterfly knife with a handle clip and clip-point blade. The knife does 35-45 damage with a average of 40. The main feature of this weapon is it's Backstabs, as they kill all users in one hit, unless the user has more than 3 health and is cloaked with the Dead Ringer, or Ubercharged with the stock Medic's Medigun. It's prime feature is the Backstab, in almost all cases instantly killing an enemy player, and as the name suggests, is from the back. Backstabs always crit doing 600% of the enemies health, and since it is a melee death the victim will scream loudly upon death. This is one of the very few stock weapons that do not have random crits, which would do 120. The other stock weapon that cannot randomly crit is the Sniper Rifle, as it would encourage body-shotting, which does 1/3 of
