Tire iron
A tire iron was a 20th century tool, intended for work on automobile wheels. In extreme circumstances, it could also be used for self-defense.
 
In 1986, Doctor Gillian Taylor allowed James T. Kirk and Spock to ride in her Chevrolet truck, warning them that she had a tire iron which was easily accessible from the driver's seat in case they tried anything funny. ()

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Hand-held weapons
Household tools