Knock-Knock

 is a unique weapon in Fallout: New Vegas. It is a unique variant of the fire axe.

Characteristics
The axe head appears to be either unpainted or the paint has been completely chipped away.

Locations
Found in Camp Searchlight's Fire Station. Once you get the key from Logan, head upstairs and search the bathroom stalls, look in the right side corner of the stall with the Skeleton to find the Knock Knock.

You must first complete the quest for Logan (Fallout: New Vegas) to get the key.

Appearances
appears in Fallout: New Vegas.