The Sapper, mentioned in the Sentry Operating Manual as the AM/FM Ultra-Sapper, is the default building weapon for the Spy. It is a small electric generator inscribed 'ELECTRO-SAPPER', with a carrying handle, two long yellow wires and a meter. It also features two clamps that are deployed when used.The sole function of the Sapper is to destroy an Engineer's buildings. Should the player select the weapon and stand near an enemy structure, they are able to see a white outline of the Sapper on the building, indicating that it is in range and can be sapped. Additionally, the needle on the gauge moves to the right red zone. Pressing the primary fire key (default key: MOUSE1) attaches the weapon, and the building is slowly damaged until it is destroyed. A sapped building immediately ceases to function; Sentry Guns do not fire, Dispensers do not heal or dispense ammo, and Teleporters do not teleport. The Engineer is also unable to use his Destruction PDA to self-destruct a sapped building. When applied to buildings, the Sapper produces electrical sparks and a loud hissing noise. When a Sapper is attached to one end of a Teleporter, another Sapper is automatically placed on the other end of the Teleporter, if it exists and is not in building progress. If the Spy is disguised, the disguise class plays a distinct, unique animation of placing the device on the building. Unlike the Spy's other weapons, using a Sapper does not cause him to lose his disguise.For each building the Spy player places a Sapper upon, a small window in their HUD appears showing both the remaining health of the building sapped and the health of the Sapper on that building.Once the building is being sapped, the Engineer owner is alerted to it in his HUD, and automatically plays a voice clip alerting nearby players of the building's predicament. Engineers can remove a Sapper with two hits from their melee weapon (three with the Jag). When a Sapper is attacked, the Spy player is notified by a similar alert in their HUD. If an Engineer removes a Sapper from a Teleporter, the Sapper at the other end is also removed. If a Medic is healing the Engineer, he can get an assist for the Sapper kill. Pyros equipped with the Homewrecker or the Maul can destroy Sappers in one hit (two with the Neon Annihilator). Enemies focused on removing Sappers may leave themselves open to a [url=https://wiki.teamfortress.com/wik