a big metal key

Thick and sturdy, this metal key must fit a very substantial lock. It has many scratches on its shiny surface, showing the years of use it has been through.

It is a big metal key.
It weighs a couple of pounds.

You identify a big metal key.
It is an unsellable key.
It weighs one pound and nine ounces, and it is worth about three celeb.
Its keywords are key, big, and metal.