Hammer

A hammer was a tool.

Dominic Montfalcon lost control of his pyrokinesis after hitting his thumb with a hammer and burned himself to death. His wife Clarissa, who had the ability to reset time, caused the event to unhappen and saved his life. (PROSE: The Death of Art)

Donna Noble used a hammer to knock out a Sontaran by striking his probic vent. (TV: The Poison Sky)

Fenric possessed a medallion in the form of a hammer that could conjure up time storms. (AUDIO: Gods and Monsters)