For example, plastic utensils have been replaced with metal ones.

This new being is clearly a master of the metal ones.

Both the plastic and metal ones did the job.

Wood tools went out when people could buy metal ones.

It feels a bit flimsy, especially when compared to the metal ones we've come to appreciate.

But the train line had problems after moving production to Mexico and substituting some plastic parts for metal ones.

The original wooden windows have been replaced by metal ones.

The odd thing, though, was that the wooden doors looked exactly like the metal ones.

The wooden doors that led from the building to the courtyard have been replaced with metal ones.

It lives with one of the organic beings that created the metal ones.