• Horologist's Wristguards
• Item Level 226Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Plate
• Wrist
• 1027 Armor
• +63 Stamina
  +42 Intellect
• Durability 55 / 55
• Requires Level 80
• Equip: Improves critical strike rating by 36.
  Equip: Restores 18 mana per 5 sec.
  Equip: Increases spell power by 74.
• 
• Sell Price: 8 7 14

Source

This item drops from the XT-002 Deconstructor in the 25-man version of Ulduar.

Patch changes

• Patch 3.1.0 (14-Apr-2009): Added. 
  

External links

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