Pens can be used as kubatons.
A belt buckle swinging on a belt can pack a wallop.
And I have other weapons besides.
A set of keys held in the left hand with the business ends poking out between the fingers. Blocking the swing with the keyed fist damages the attacker's hand or arm. Follow through with a short punch to the side of the neck- the brachial plexus. It will usually disable the attacker long enough to escape.
If there are multiple attackers key the eyes; you need as many as possible down and screaming to discourage the others.