Improved Two-weapon Fighting

Type: General, Fighter
Source: Player's Handbook

You are an expert in fighting two-handed.
Prerequisite: Dex 17, Two-Weapon Fighting, base attack bonus +9
Benefit: In addition to the standard single extra attack you get with an off-hand weapon, you get a second attack with the off-hand weapon, albeit at a -5 penalty (see Two-Weapon Fighting).
Special: 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 the prerequisites for it, but only he is when wearing light armor or no armor.