"We got shanked so hard!" - Anthony Padillia
The knife is a traitor only weapon available in the traitor shop. On most servers it is one hit kill and can be only used once, however on some servers they are reusable and require more hits to kill. You are also able to throw the knife (Right Mouse Button) which is an instant kill if it hits. The knife is a classic traitor weapon and is a handy one if used well.