Flux metal is a liquid-like metal that can still hold shape without spilling, invented by Foaly. It is saturated with nano sensors that read everything from the hand print to the DNA of the person who sticks their hand in to it. As said by Wing Commander Vinyáya in The Lost Colony, "Even if someone cut my hand off and stuck it in there, the sensors would read a lack of pulse." It was used as the lock of the door leading to Foaly's Section 8 lab.