Strength of the Automaton is a medium armor set. The 5-piece set bonus adds 400 Weapon Damage to your Physical Damage abilities.
The Strength of the Automaton set is part of the base game. It drops in Darkshade Caverns I and Darkshade Caverns II in Deshaan. Each set item is bound on pickup. You can acquire medium armor, weapons and jewelry of this set in the Dwemer motif style.