Abstract: An elongated flexible strap member is provided including a lateral projection on one end portion thereof. The projection equipped end portion of the strap member is insertable into the transverse lock body bore of a door with the projection on the strap member received within the end of the lock bolt bore of the door opening into the lock body bore. When the door is pre-hung within a door frame, the end portion of the strap not equipped with the projection is deflectable across one side surface of the door between the lock body bore and the free swinging edge of the door, across the interface between the door edge and the opposing door frame portion across the frame portion and thereafter deflectable across and securable to the surface of the door frame portion opposite the surface thereof which opposes the free swinging edge of the door.