Sword Chucks (3.5e Equipment)
From D&D Wiki
It looks as someone attached two short swords together with a chain at the end of the hilt in attempt to make some sort of Sword Nunchaku. Its lethality lies not in the swords, nor the chuck, but the combination of the two.
Sword Chucks function kinda like a Two-bladed Sword. You can attack with one sword of the Sword Chucks as a standard action, but you can use a Full-round action to attack with both of the swords dealing 1d6/1d6 dmg. You must make an attack roll (at highest BAB) against yourself, if you fail, you take 1 dmg. You can also use the Sword Chucks as two Short Swords incuring all the TWF penalties. Also, a monk can use his/her Flurry of blows with this weapon but still must make an attack roll against himself/herself to avoid taking 1 dmg. Sword Chucks add a +2 bonus on checks made to disarm the enemy (including the roll to avoid being disarmed). They convey the Cleave (or greater Cleave if Cleave is already possesed) feat and require Weapon Proficiency: Exotic. Any 8-Bit Fighter counts all sword chucks wielded as having an extra +1. An 8-Bit Knight may wield 2 pairs of sword chucks, although he must make the self dmg check for each pair of sword chucks individually with each dealing a critical hit instead of the normal 1 dmg if failed.