Destroyed Collar

The  is a slave collar that has detonated, and can be used as a necklace of sorts.

Locations
It is obtained when the you start the brotherhood of steel story line but is removed after the first quest you do for them and is then unobtainable after that, unless mods are used.

Appearances
The appears in Fallout: New Vegas.

A undestroyed version is used in fallout 3 by the slavers in paradise falls. it was placed on the neck of slaves by the slavers.