Best way to obtain these items are via vote points on your server.
I have tested all three of these items out and they all work on LW.
You simply cast them on the mob and it basically turns them into a dead npc.
You can proceed to kill the target without taking damage.
They will not attack or anything of the nature, just simply sit there til they die.
Easily solo bosses with this although it may take awhile with the insane HP.
The Items:
Sparrowhawk Net: Sparrowhawk Net - Item - World of Warcraft
Chicken Net: Chicken Net - Item - World of Warcraft
Bat Net: Bat Net - Item - World of Warcraft