The strike package was a euphemistic name for a bombardment weapon devised by Norigom for the raid on Utopia Planitia in 2409. (Bait and Switch)
The strike package was an incredibly uncomplicated weapon for its time, consisting of 10 metric tons of uranium-238 that were to be dropped from the cargo bay of a Klingon bird-of-prey traveling at a significant fraction of the speed of light, inflicting catastrophic impact damage. It featured only rudimentary maneuvering thrusters.
Deployed by IKS mupwI' against Utopia Planitia Fleet Yards, the strike package completely destroyed the shipyard's control center, overpenetrating to also impact Kincaid City on the surface of Mars. (Red Fire, Red Planet)
In 2410, Brokosh later employed similar weapons against an Imperial Starfleet base in the Arawath system. A trio of ships in his flotilla deployed strike packages, destroying two orbital defense platforms and multiple enemy starships. (The Wrong Reflection)