With the new inquisitor martyr 2.0 system, they removed power rating from items.  So, what is the 'hammer icon' at the top right of every item screen mean?  It is confusing because that number does not relate to my item level, i.e.:  I will have a level 3 item with a 'hammer icon' of 15, and then a level 8 item with a 'hammer icon' rating of 4...

I apologize if this makes no sense, but I am new to the game.  Everything that I learned about the game with based on the pre-2.0 power rating system.

So my question is:  does anybody know what that icon means?