- Gnomeregan Auto-Blocker 600
- Binds when picked up
- Unique
- Trinket
- Requires Level 70
- Item Level 110
- Equip: Increases your dodge rating by 39.
Use: Increases your dodge rating by 200 for 40 sec.
Source
This item is sold by G'eras in Shattrath City for 213 Justice points.
Notes
Often Misunderstood, this trinket is designed almost exclusively for Protection Warriors.
Protection Warriors use the talent granted ability 
[Shield Slam] as one of their main source for producing both threat and damage, Shield Slam adds the block value to the damage of the slam, when activated this trinket adds 259 pre-mitigation damage (330 with the talent 
[Shield Mastery]) to Shield Slam, and this value possibly stacks with 
[Eternal Earthstorm Diamond] making it even better.
The downside of this trinket is that damage mitigation is often high priority for tanks and there are other much better mitigation trinkets available than this.
(Above may be out of date as of Patch 4.0.1.)
In the WoW TCG.