There is a scene where a woman is taking a shower. and her breast is shown for a few seconds. but that is all.

Many scenes where blood is squirting all over the place.

Man hits multiple people over the head with a sledge hammer.

A 2x4 with nails in it, is used as a weapon.

A "death machine" kills multiple people.

none really.

In one scene a father and son sit in a car and smoke cigarettes. (scene lasts for approx. 4 minutes)

The entire movie is very intense. And many parts are frightening.