Crowbar

The Eighth Doctor destroys the proto-morphic lifeform with a crowbar. (COMIC: The Curious Tale of Spring-Heeled Jack)

A crowbar, sometimes called a jemmy, was a heavy metal tool used for opening doors or padlocks. (PROSE: The Monsters Inside) The Eighth Doctor attached some bullets to a crowbar and used it to smash the proto-morphic lifeform in Blackthorne Gasworks. (COMIC: The Curious Tale of Spring-Heeled Jack)

Ianto Jones had a crowbar, which he named Rob. (AUDIO: The Last Beacon)

Mike, a friend of Garry Fletcher, once used a crowbar to kill members of an alien race when the two decided to steal the alien's body-swapping technology. (PROSE: Joyride)