Electric strike installation tool and method

A lock jamb punching tool for cutting an electric strike aperture in a lock jamb of a metal door frame, the lock jamb having a rabbet having a depth extending from a face to a stop, and a strike plate aperture defined transversally across the rabbet, the tool comprising a face member having a die aperture, a rabbet member protruding normal to the face member, a jamb area between the rabbet member and the face member, and a punch in the jamb area, the punch being slidable into the die aperture along a punch path, and an actuator to move the punch along the punch path, wherein during use, the jamb can be positioned into the jamb area of the tool by inserting the punch through the strike plate aperture, with the rabbet member in abutment with the rabbet and the face member in abutment with the face, and the actuator can be actuated to pull the punch into the die aperture, thereby cutting the electric strike aperture in the face of the lock jamb, and further wherein the rabbet member includes at least one shim plate receiver configured for selectively receiving a varying number of shim plates between the rabbet member and an abutment member configured to abut against the rabbet, said variation in the number of shim plates changing the thickness between the abutment member and the rabbet member.