A plain wooden rolling pin used for flattening dough, the rolling pin has since been used to crack skulls. It is the weakest weapon in the game and thus practically useless. Even with a Melee weapons skill of 100 and all the affective perks, it is unable to kill even the weakest enemies in the game without more than a few swings. However, it requires no skill and only a Strength of 2 to use, so every character can use it (not that they'd want to).
Its special V.A.T.S. attack is "Lights Out", which does 125% damage at the cost of 30 action points (requires a Meleeskill of 50).