How to replace this weird faucet aerator?
The faucet is broken. Your faucet is of a newer type where the water flows through the spout and out the aerator via a plastic tube that runs inside of the metal &quot;spout&quot; (this allows manufacturers to avoid metallurgical complications related to the amount of toxic lead in the brass used for the spout).
The aerator piece has broken away from its attachment point; the piece that it used to thread onto is stuck in the aerator itself.