Kut'luch
The kut'luch was a bladed weapon traditionally used by Klingon assassins. The weapon had an unevenly serrated blade and was capable of inflicting a very serious wound. The kut'luch was frequently twisted while the blade was still inside its target to inflict as much pain and damage as possible. The weapon looked similar to a mevak.

A pair of assassins hired by Duras used a kut'luch to attack Kurn in 2366. ()

The kut'luch was also used in a ritual act of violence, signifying when a Klingon became a warrior. ()

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de:Kut'luch
Klingonese
Hand-held weapons