Box pack. Deadbolt thrown or retracted by key from outside or by inside turn piece. Bolt automatically deadlocks when fully thrown. Solid 1-piece design. Provides Grade 1 features of security against hammer and crow bar prying, kick-ins, and cylinder knock out attacks. 3" screws with steel door frame reinforcer protects against violent forced entry attacks. Triple option latch packaged with a 1" square corner, 1/4" round corner, and 1" circular drive-in deadbolt, adjustable for 2-3/8" or 2-3/4" backsets. Strike includes 1/4" round corner strike and square corner strike. Grade 2 construction for superior durability and quality performance. Lifetime mechanical warranty. Order a case of 20 and you will get 5 sleeves of 4. Each sleeve of 4 will be keyed alike.