Wearing any four (or more) of a superior tetsu armour set (including augmented parts, but not weapons) grants a passive ability, Iron Fist, which gives a chance to obtain a ports resource crate when defeating an opponent. Armour gizmos charged with perks can be used to enhance the armour's abilities. As a body slot item, the Augmented Tetsu body can hold 2 gizmos, allowing up to 4 perks (2 on each).