You can wield larger weapons as easily as if they were made for you.
Prerequisites
Strength 17, base attack bonus +7, Iron Grip.
Benefit
You may treat any weapon as if it were one size category smaller for determining how difficult it is to wield. For example, a Medium creature with this feat could treat a Medium longsword as a light weapon rather than a one-handed weapon and a Large greatsword as a two-handed weapon rather than being too large to wield.