Source

This item is crafted with Engineering (100); taught by trainers.

Materials required:

3x [Bronze Bar]

Required tools:

•  [Blacksmith Hammer]

Notes

On use, this item creates 2-3  [Ruined Metal Parts] and has a chance of granting you a skill point in Engineering.

Skill progression

100 → 115 → 122 → 130.

Patch changes

• Patch 4.3.0 (2011-11-29): Added. Replaces  [Practice Lock].
  

External links

• Wowhead
• WoWDB