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. The Knock-Knock namesake is a reference to the real world application of this type of fire axe as a forced- entry tool. <- Are you sure? Are you sure it isn't a reference to The Shining "Here's Johnny" busting through the doors, knock knock? <- I agree with second kid, probably a reference to the Shining

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 to get the key. Or you can kill Logan.

Appearances
appears in Fallout: New Vegas.