Where old and abandoned workings join the inhabited levels the Dwarfs have docked passages and built gates, but even so they must be constantly on the lookout for intrusion from below. The Ironbreakers guard these old passages and protect the stronghold from attack. They spend much of their time below ground in the deepest, least-visited parts of the stronghold. Because of the extreme danger of their duties they wear heavy gromril armour engraved with runes.[1a][2a]