Originally Posted by boomhauer

Boker Wilson Tactical Para Cord Monkey Fist, Olive, Glow in the Dark (09WT103) - KnifeCenter

You might try the "monkey fist". It is a steel ball bearing wrapped in parachute chord.

It will knock the teeth out of a dog, put a dent in the hood of a car and repel "urban youth" that harras you as you ride by a city bus stop.