I'll admit that I don't practice with this weapon much.
Recently I decided to make the chain longer for extra reach.
For those who do not know this weapon it is a chain with an iron weight at each end. The weights are flung at the opponent to stun him/her while the chain itself is used to ensnare or as a garrot.
This particular weapon is associated with Ninjutsu, but Chinese martial arts have similar weapons using blades or weights at the end of ropes or chains.
As you can see from the video I have some trouble controlling this weapon. If anyone has a better video to post- you can email it to me at email@example.com.