You can grapple enemies more firmly with only one of your natural attacks.
Prerequisites: Str 17, Snatch.
Benefit: When grappling an opponent with only 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 on grapple checks to maintain a hold with only one part of your body.
Source: Draconomicon, page 72.