All rogues have some understanding of opening locks and spotting traps, but particularly dexterous hands and a steady grip give the character a bonus when picking locks or disarming traps. The character's cunning score also contributes to these skills.
Since lock picking and trap disarming are based on a rogue's cunning skill, taking this talent will give +10 Cunning as it applies to lock picking and trap disarming, but not to anything else.