Talk:Chigiriki (3.5e Equipment)
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A common use of a chigiriki is to trip one's opponent, using the spiked ball on a chain, and then disable them, by striking them with the pole portion of the weapon. http://everything2.com/title/Chigiriki
I would suggest the following to make this weapon useful/unique.
Treat the weapon as a limited double weapon. 2d4/1d6 to represent the chain/staff combo. The chain end has reach of 10ft, and the staff end has reach 5ft thus can be used against adjacent foes. Otherwise, it cannot be used as if fighting with two weapons.
You can make trip attacks with the chain. If you are tripped during your own trip attempt, you can drop the weapon to avoid being tripped.
Upon a successful trip attempt, if you would normally be allowed to make a 5ft step, you may do so and immediately strike the tripped opponent with the staff end of the weapon.