Bone dagger

Bone daggers can be bought from Nardok's Bone Weapons in the Dorgeshuun Mines outside Dorgesh-Kaan for 2,000 coins. They can also be poisoned.

Its stats are the same as those of the iron dagger.

The Bone dagger is also used for a medium clue scroll step.

Special attack
The bone dagger has a special attack, Backstab, (75%) which has a guaranteed hit if you weren't the last one to attack the target, and lowers the target's Defence by the amount of damage dealt, similar to the Bandos godsword's and Dorgeshuun crossbow's special attacks.

The special attack can only be used after completing the Death to the Dorgeshuun quest, but it can be wielded and poisoned without completing the quest.