Highlights: For keyed exterior doors Both bell-shaped knobs lock or unlock by key outside or turnbutton inside Security knobs feature full 1" solid core throwbolt, all metal mechanisms, anti-pry shield and pick resistant 5-pin system DOOR PREP: 2-1/8" Cross Bore, 1" Edge Bore, 1" x 2-1/4" Latch Face BACKSET: 2-3/8" sta