Blowtorch

A Blowtorch is a general purpose tool used to diffuse a flame to apply heat upon an object. It is often used for repairs and welding.

Battlefield Vietnam
In Battlefield Vietnam, the Blowtorch is issued as an option to the Engineer kit of any American and South Vietnamese faction. The blowtorch is the opposite of the wrench, as the blowtorch inflicts damage to vehicles rather than renew its health. It is dangerous to use to destroy a vehicle, such as a tank, as the target will explode. It is recommended to only use the blowtorch to almost destroy a vehicle, and then finish it off with C4, which is also issued to the Engineer.

Battlefield: Bad Company 2: Vietnam
In Battlefield: Bad Company 2: Vietnam, the Torch is issued to the Engineer kit and functions identically to the Repair Tool from the base game, its stats for repairing speed and overheating speed are the same.

Battlefield 3
The blow torch