Felg'ra class

The Felg'ra-class was a Klingon warship that saw service during the 24th century.The class was first commissioned in 2346. 

A pair of Fel'gra-class vessels attacked a Cardassian convoy under Starfleet escort while the convoy waited for the Cardassian replacement escort at the Federation-Cardassian border in early 2372. One of the vessels launched a boarding action against the USS during the battle and was destroyed by Cardassian warships when they arrived on the scene.