Tri-Cobalt Device  .
During the initial scare in System J-25 with the Borg one of Starfleets many projects was the Tri-Cobalt Device. It was the predecessor of the Quantum Torpedo but in effect had ten times the destructive capability. Again, this project used three of the most powerful explosives know to Starfleet, Tri-Cobalt, Antimatter and Quantum Filaments. As mentioned above the Quantum Torpedo uses Quantum Filaments which arc out over the targets.