Rend (3.5e Feat)
From D&D Wiki
You can rend things you hit with your claws
Prerequisite: Power Attack, Snatch, Strength 13+
Benefit: If you strike the same opponent with two claw attacks, you automatically inflict additional damage equal to two claws plus 1.5 times your strength bonus. You cannot grab an opponet at the same time you rend them.