Includes two Tylo entry knob locksets and two No.660 deadbolts. Knobs locked or unlocked by key outside or turnbutton inside. Deadbolt operated by key outside and thumbturn inside. Security knobs feature full 1 in solid core throwbolt, all metal mechanisms,anti-pry shield 5-pin system. DOOR PREP: 2-1/8 in Cross Bore, 1 in Edge Bore, 1 in x 2-1/4 in Latch Face. BACKSET: 2-3/8 in standard and adjustable 2-3/8 in and 2-3/4 in optional. DOOR THICKNESS: 1-3/8 in to 1-3/4 in CYLINDER: 5-pin. FACEPLATES: 1 in x 2-1/4 in round corner.STRIKES: 2-1/4 in full lip. BOLT: knob 1/2 in throw, deadbolt 1 in throw. HANDING: Reversible for right or left hand doors. ANSI/BHMA: knob Grade 3, deadbolt Grade 3.