It is useful to break the planks if you want to escape from the door. The Hammer is heavy enough to activate Bear Traps. The head is very dull and seems to have been used for a very long time. The handle appears to be made of a fairly dark, weathered wood.
The handle is a long piece of wood connected to the head of the Hammer. The head is composed of a circular shape, with a pyramid-like shape coming off of it. The Hammer is made up of the head and the handle.