Whet stone (Fallout 3)

is an item in Fallout 3, useful only as Rock-It Launcher ammunition. Whetstones are relatively rare. One can be found in an abandoned farm (guarded by 4 Giant Ants) to the west of Vault 101. A rare Wood Chipper and a Mini Nuke can also be found in this location. There's Also One in the Scrapyard by the house that needs a key.