Improved Two-Weapon Fighting
You are an expert in fighting two-handed.
Prerequisites: Dexterity 17, Two-Weapon Fighting, base attack bonus +6.
Benefit: You get as many attacks with your off-hand weapon as you do with your main-hand weapon, at the same base attack bonuses.
Normal: Without this feat, you can only get a single extra attack with an off-hand weapon.
Special: A fighter may select Improved Two-Weapon Fighting as one of his fighter bonus feats.
A 6th-level ranger who has chosen the two-weapon combat style is treated as having Improved Two-Weapon Fighting, even if he does not have the prerequisites for it, but only when he is wearing light or no armor.