The breaker is a large salvage ship: a cruiser-size ship built around a heavy frame, with motors for its cutting gear, thrusters and containers. It takes a wreck or a derelict apart three times as fast as a scrapper and holds far more scrap.
The breaker is locked behind research. An ARCHON unlocks it by trialling a scrapper design of its own that salvages faster than the blueprint. A Shipyard then builds it.