A special warhead for Lance Torpedoes that uses a fusion explosion to power a reaction similar to that in a tractor beam emitter, and produce a very powerful asymmetric gravity field for a brief instant. For that instant, any ship within the area of the effect will experience a rapidly changing asymmetric gravity field and will be torn apart by its own weight. A development of the same principle behind Graviton Cannons.
Behind the Scenes
This is a concept we borrowed from one Martin came up with for a Star Trek fanfic he never got around to writing back in High School. In turn, he was inspired by the "Gravitic Mines" seen in the Star Trek tie-in novel "The Kobayashi Maru" by Julia Ecklar. These have not actually been seen in the story as of yet.