depressing happy sad exciting
it makes your nails grow but it doesn't make it hard
nails
This is a simile comparing someone or something to nails. Nails are hard and tough, so this person or thing is being declared to be very hard and tough.
The setting of the story does this.
Hard as Nails - 2007 is rated/received certificates of: Australia:M
It compares the the nail to how hard it is.
The cast of Hard as Nails - 2007 includes: Justin Fatica as himself
Hard As Nails - 2001 V is rated/received certificates of: USA:R
tone
authors tone is the attitude in the story
A playful tone
metal