Grapple (Quality)

When wielding a weapon with the Grapple quality, if you successfully fulfill the requirements listed in the weapon description, you can initiate a grapple against your target. When you use a Grapple weapon, you get a +2 weapon bonus on Might Skill checks when attempting to grapple an opponent. In addition, if your grapple combat maneuver is successful, add +2 to the damage inflicted by the combat maneuver.

The creature you are grappling must remain within the reach of the Grapple weapon in order to maintain the grapple. You are considered to be in a grapple, regardless of whether you are adjacent to the creature you are grappling. If you move far enough away to be out of the weapon's reach, you end the grapple with that action.