You are particularly skilled with a specific combat maneuver.
Prerequisites: Base attack bonus +1.
Benefit: Choose one combat maneuver (bull rush, dirty trick, disarm, grapple, reposition, sunder, or trip). You gain a +4 bonus to your attack roll to resolve that combat maneuver.
Special: You can take Improved Combat Maneuver multiple times. The effects don’t stack. Each time you take the feat, it applies to a new combat maneuver.