The device made famous by the Argentine Cowboy is called the "bolo". This device consisted of two heavy balls connected by a string and was thrown at and wrapped around an animals legs causing it to trip. Now this idea has been adapted for the 21st century in the form of a 12 Gauge shotgun round. This round consists of two lead slugs connected by a steel wire that whirls and twirls during flight devastating your target. Try your hand at being a 21st century cowboy today. 2 3/4" round.