Box pack. For keyed exterior doors. Exterior knob locked or unlocked by key. Unlocked by turn piece on the interior knob. Triple option latch includes 1/4" round corner, square corner, and 1" circular drive-in latch, adjustable for 2-3/8" or 2-3/4" backsets. Strike: 1/4" round corner and square corner full-lip strike. Grade 2 construction. Lifetime mechanical warranty. 10 year finish warranty. Keyed alike in multiples of 4 when full case of 20 ordered.