Secured by four 2″ long hardened screws. Strike box prevents lock bolts from being pushed in with a punch on out-opening doors. 2 mounting screws position at bottom of box are offset and angled to center of jamb making solid connection between strike and door frame stud. Constructed of heavy 16-gauge steel. Box dimensions: 1-5/8 H. x 3/4″ W. x 1-1/4″ D. Face plate dimensions: 4-7/8″ H. x 1-1/4″ W. Fits ASA cutout. Brass finish.