2 items: Adds 129 Damage
3 items: Adds 1487 Penetration
4 items: Adds 129 Damage
5 items: When you deal damage to an enemy who is Off Balance, your Physical and Spell Penetration is increased by 5312 for 10 seconds.

Type: Craftable
Location: Western Skyrim
Requires DLC: Greymoor

Obtainable items:
Jewels
Weapons
Light Armor
Medium Armor
Heavy Armor