Includes two Tylo entry knob locksets and two #660 deadbolts. Knobs locked or unlocked by key outside or turn button inside. Deadbolt operated by key outside and thumb turn inside. Security knobs feature full 1 in solid core throw bolt, 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 of 2-3/8 in standard and adjustable 2-3/8 in and 2-3/4 in optional. Door thickness 1-3/8 to 1-3/4 in. Cylinder 5-pin. Faceplates of 1 in x 2-1/4 in round corner. Strikes of 2-1/4 in full lip. Bolt knob 1/2 in throw, deadbolt 1 in throw. Reversible for right or left hand doors. ANSI/BHMA knob Grade 3, deadbolt Grade 3.