During combat, you can attempt to perform a number of maneuvers and that weapon is just the best tool for it.

Prerequisites: Weapon Focus(Any Weapon), BAB 3+

Benefit: Weapon for which you have weapon focus that have a combat maneuver quality which matches to the combat maneuver you perform provide a +2 bonus instead of a +1 bonus. E.g. the trip special quality gives bonus for trip maneuvers, disarming for disarm maneuvers.