The Qur'an says non-Muslims will be punished with hooked rods of iron

Quran 22:19 to 22:22:
These twain (the believers and the disbelievers) are two opponents who contend concerning their Lord. But as for those who disbelieve, garments of fire will be cut out for them; boiling fluid will be poured down on their heads,

Whereby that which is in their bellies, and their skins too, will be melted;

And for them are hooked rods of iron.

Whenever, in their anguish, they would go forth from thence they are driven back therein and (it is said unto them): Taste the doom of burning.