While this unit is within 6" of any friendly Grey Knights Techmarine units, models in this unit have Weapon Skill and Ballistic Skull characteristics of 4+ and a Leadership characteristic of 9. In addition, if you army is Battleforged then for each <Brotherhood> Techmarine included in a Detachment, one <Brotherhood> Servitors unit can be included in that Detachment without taking up a Battlefield Role slot