The Single Handed skill increases the damage that one-handed weapons such as daggers or axes deal. This is mostly useful for Man-at-Arms or Scoundrel classes, as they are the ones that mainly deal with single-handed weaponry.
If you are a Dual Wielding scoundrel, this is the only skill which boosts the damage of your abilities. However, increasing Dual Wielding improves your stabbing abilities much more than this skill, as it also increases the amount of times you can attack per turn.
|Single Handed Skill Level||Damage Increase|