Nail Board (Fallout 3)

The Nail Board is just a wooden board with nails covering it. This makeshift weapon can be found in Fallout 3, usually in the possession of Super Mutants.

The unique Nail Board, the Board of Education, can be found in Clifftop Shacks.

Trivia
Possible reference to the popular animated series The Simpsons' Halloween special entitled Treehouse of Horror II.