When you engage in two-weapon fighting, you can add your ability to the damage of the second attack. Additionally you can draw or stow two one-handed weapons when you would normally be able to draw or stow only one.

If you are 6th level or higher, you gain a +1 bonus to Defense while you are wielding a separate melee weapon in each hand and either you gain a +1 bonus to attacks with light weapons you are wielding in separate hands or you can use two-weapon fighting even when the one-handed weapons you are wielding aren’t light.