Cyber-bomb

"Let the Earth see the effectiveness of Cyber technology. Explode the bomb."

- Cyber-Leader

Cyber-bombs are explosives used by the Cybermen, one being capable of destroying a planet and others supposedly capable of destroying a TARDIS.

The Cybermen attempted to destroy Earth in 2526 with a Cyber-bomb, but it was deactivated by the Doctor. (DW: Earthshock)

A group of Cybermen that was transported to the Death Zone on Gallifrey tried to use several bombs to destroy the Doctor's TARDIS. (DW: The Five Doctors)