• Perilous Bite
• Item Level 232Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Dagger
• One-Hand
  
• Speed 1.80
• 257 - 387 Damage
• (178.9 damage per second)
• +51 Agility
  +53 Stamina
• Red Socket
• Socket Bonus: +4 Armor Penetration Rating
• Durability 75 / 75
• Requires Level 80
• Equip: Improves hit rating by 34.
  Equip: Increases attack power by 62.
  Equip: Increases your armor penetration rating by 24.
• Sell Price: 22 8 48

Source

This item drops from Assembly of Iron on hard mode in the 10-man version of Ulduar.

Patch changes

• Patch 3.1.2 (2009-05-19): Stats changed. 
  
• Patch 3.1.0 (14-Apr-2009): Added. 
  

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB