She scratched delicately at a point just above her right eyebrow with a single nail.

A single nail turns out to have a massive influence, but there was no way of knowing that beforehand.

Every single nail was punched way down below the grain.

Not a single nail was used during its construction.

There is not a single nail used in the entire structure.

Not a single nail was used in the construction.

One of the heels was loose, hanging from its parent shoe by a single nail.

The structure was built with bricks from the bottom to the top entirely, without a piece of wood or a single nail.

The whole building was constructed without using a single nail and is regarded as a miracle in China's architectural history.