Noun
war hammer (plural war hammers)
A medieval hammer-like weapon used in close combat.
Tarasov has contested Heberle's status as the inventor of the instrument, and has argued that the csakan grew out of a Hungarian war hammer of the same name, which was converted into a recorder, perhaps for playing military music. Source: Internet
Design Detail of the head of a war hammer The war hammer consists of a handle and a head. Source: Internet