As an action, you can touch a piece of nonmagical iron or steel that isn’t being worn or carried by another creature to cause it to grow into an object up to 2 kilos in weight, such as a dagger, sword, crowbar, or steel shield. This object remains in this form for the duration or until broken or destroyed, at which point it shrinks back to its original size and shape.
If you cast this spell multiple times, you can only cause up to two objects to grow, and you can dismiss such an effect on your turn (no action required).
At higher levels
The maximum weight of objects that the object can grow into with this spell increases when you reach 9th level (5 kilos) and 17th level (7 kilos).