You can grapple enemies more firmly than normal with your natural attacks.
Prerequisite: Str 17, improved grab.
Benefit: When grappling an opponent with the part of your body that made the attack, you take only a −10 penalty on grapple checks to maintain the hold.
Normal: Without this feat, you take a −20 penalty оп grapple checks to maintain a hold with the part of your body used to make the attack.
Source: Savage Species, page 37.