The Bla'koth class was a type of heavy escort that saw service in the Klingon Defense Force during the 24th century. (Ship Recognition Manual, Volume 3: Ships of the Klingon Empire)
The IKS Kahle'mIn was a Bla'koth-class vessel assigned to the House Kang Fleet Wing 327 during the Dominion War. (The Dominion War Sourcebook: The Fires of Armageddon)