Rolling pin

"Weapon" you can equip and use during the Tranquility Lane quest. It is found on the table in the kitchen of Rockwell Residence. There are other places to get it but it is rare.

Killing anyone in Tranquility Lane is temporary, as talking to Betty will reset them.

Also found behind Pinkerton's counter inside a suitcase in the Broken Bow of Rivet City.(Might be randomized, but I found it there.)

I found one in the taft tunnels not to far from the last door with the guy in power armor.Its on a table near a plush chair.