|Book(s)|| A Dance with Dragons (Appears)|
The Winds of Winter (Appears)
He is a wiry red-haired youth.
A Dance with Dragons
Hammer is sleeping off a drunk when Tyrion Lannister and Penny arrive at the forge to pick out some company steel after signing with the company. Nail is there to admit them to the wagons to choose weapons and armor. He tells them that most of it is crap iron, but that they're welcome to anything they can use.