I received an Iron Lockbox today through the prize wheel. I've checked the wiki, however, and it makes no mention of what items can be found inside the Iron Lockboxes.
What exactly can one find in an Iron Lockbox (list please)?
Gives random accesories, shadow keys (lots of them) , Cool Wolver Tail, and other stuffs which in that case are rare.
Added in the October 5, 2011 patch:
Only accessories can be found in lockboxes. Each lockbox has 0.1% chance of containing an aura, which comes in varying features.
Each accessory (with the exception of certain Wings) can come with any color, including the ever so rare Prismatic.
List of colors:
List of accessories:
(will be updated)