Twin Sword Strike
You can strike with both your weapons at once.
Prerequisites: Dexterity 17, Two-Weapon Fighting, Improved Two-Weapon Fighting, Advanced Two-Weapon Fighting, base attack bonus +11.
Benefit: When taking the attack action, attacking as part of a charge, or using the Spring Attack feat, you may take an additional attack with your off-hand weapon. Normal two-weapon fighting penalties apply to both attacks.
Normal: You may only attack with your main-hand weapon when taking the attack action, charging, or using Spring Attack.
Special: A fighter may select Twin Sword Strike as one of his fighter bonus feats.
An 11th-level ranger who has chosen the two-weapon combat style is treated as having Twin Sword Strike, even if he does not have the prerequisites for it, but only when he is wearing light or no armor.