From the publisher:
"Expand your Iron Gauntlets experience with new player races, backgrounds, and vocations, plus new options like skill flairs, convictions, and threads for more serious character development. The Companion also compiles new and existing options and alternate rules from various sources in one place, not to mention sample difficulty ratings and new storytelling advice. And in addition to physical combat, the new social conflict rules mean that characters don't need to be big and tough to win over the crowd."