Type 14 Magnetic/Anti-Tank Mine

The Type 14 Magnetic/Anti-Tank Mine is a UNSC explosive ordnance.

Background
The Type 14 Magnetic/Anti-Tank Mine is used as both a mine and a satchel-charge type bomb, containing 6.8 kilograms of C-7. The arming fuse can be set for five, ten, or fifteen seconds. The magnetic attachment device ensures that it will adhere to a vehicle which passes over it. It is used exclusively in Halo 2 and Halo 3 multiplayer matches, and is not featured in any campaigns or in any novels.

Trivia

 * This is also used as "The Bomb" in Assault-type games from Halo 2 and Halo 3. Additionally, it is used to portray Andy in the machinima series Red vs. Blue.
 * The bomb has scripted messages embedded on it, each designed for a specific multiplayer map. For more, see Messages on Bomb.