You hew your foe with a simple attack and then grab it with your empty hand to keep it from escaping.

At-Will   ✦     Martial, Weapon
Standard Action      Melee touch

Requirement: You must have a hand free.

Target: One creature

Attack: Strength vs. AC

Hit: 1[W] + Strength modifier damage, and you grab the target. The grab ends automatically at the end of your next turn.
Level 21: 2[W] + Strength modifier damage.

  Brawler Style: When making an opportunity attack, you can use this power in place of a melee basic attack.

Published in Martial Power 2, page(s) 7.