Rope Dart (3.5e Equipment)
From D&D Wiki
At first glance this weapon appears to be a reinforced iron or steel dart attached to about 20 feet of silk rope. When wielded, the length of the rope is held in the left hand while the right hand spins the end attached to the dart at devastating speeds. The dart is thrown but can be quickly retrieved as a free action thanks to the rope attached. This weapon can be used to trip opponents and the weapon can be dropped to avoid being tripped. You also gain a +2 to disarm attempts. This weapon has a variable reach from 15 feet to 5 feet. Weapon finesse can be used when attacking with this weapon.