Abstract: A strike plate assembly for mounting on a door frame is disclosed. The door frame forms a clearance hole for receiving the strike plate assembly. A mounting plate is affixed to the door frame in the clearance hole. The mounting plate forms an opening for receiving a bolt from a door knob or lock, such as a dead bolt lock, and forms two substantially parallel slots. A strike plate is affixed to the mounting plate. The strike plate also forms an opening for receiving a bolt from a door knob or lock and forms two substantially parallel slots which are at right angles to the two substantially parallel slots of the mounting plate. Each of the parallel slots of strike plate crosses over a corresponding one of the parallel slots of the mounting plate when the strike plate is properly affixed to the mounting plate. A pair of nuts and bolts affix the strike plate to the mounting plate. One bolt fits through each of the parallel slots of the strike plate and the corresponding parallel slot of the mounting plate.