The Muzzle is an object used to stop a creature from biting.
Two Dragons went to Pier 5 and muzzled and killed a mutant in order to take his finger with a Ring that opened the gate to the Rat's Den.
The Manhunter investigated the event and took the muzzle from the ratman's body. Soon after he went to Tad Timov's apartment, and used the muzzle to neutralize Tad Timov's dog in order to search it.