The Disguise Kit, known as the Spytron 3000 is a default weapon for the Spy. It holds six cigarettes and appears to be a normal case, but includes hidden technology.
The Disguise Kit allows you to disguise as any class (default key: 1-9) from RED or BLU (default key: ' or -) on normal maps, or all four teams (RED, BLU, GRN and YLW) on four-team maps. On these maps, you can also disguise as 'grey' team, which allows enemy players to see you disguised as the current team they are on.
Disguising as a class takes two seconds, in these seconds smoke particles surround the Spy and are visible to other players. If you are changing disguises, these particles are only visible by teammates. Attacking whilst disguising will immediately cancel it. Upon disguising successfully, or attacking in a disguise will show an outline of a spy on the screen. The HUD will then display information about your current disguise; class, health, weapon and name. Reloading your weapon while disguised shows enemy teams reloading the weapon on your disguise. Pressing the last disguise button (default key: b) changes this disguised weapon to one relative to the slot they have active.
Taunting with this weapon active but not disguised results in one of two taunts; the community named Spycrab and a cigarette flick. Looking up and taunting will always guarantee the Spycrab taunt to play, otherwise there is approximately a one-tenth chance. This is currently the only weapon that has more than one taunt.