2 items: Adds 12-1096 Maximum Stamina
3 items: Adds 1-129 Weapon Damage
4 items: Adds 9-833 Weapon Critical
5 items: Increases the radius you can detect Sneaking enemies by 50%. Increases your damage done to Sneaking enemies by 20%.
The set consists of medium armor and jewelry in all slots, as well as weapons and shields of all types.