Cyber-bomb

Cyber-bombs are explosives used by the Cybermen.

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)