A rock mole can dig straight through solid rock. It has an animal body. It has no hands. It eats metal.
A rock mole is a member of the rodent family. They get their name from their ability to tunnel through rock in the same fashion that a mole tunnels through earth. They are known to eat anything they come across in their diggings, although it is still unknown how they convert some of these things into something of nutritional value.