Wilson 5088-TK Swing-Out Automatic Deadlatch, Dual Purpose Latch And Deadlock Design With Y1 Keyway, featuring a single cylinder design that is keyed different. This strong and streamlined deadlatch combines the features of the night latch and the deadlock. It can be easily operated without any complicated instructions. Just slightly slam the door. Our special patented automatic bolt will go further in to the strike for more security. The latch can thus be deadlocked automatically with a one hand operation. No auxiliary bolt is involved. More over, the embedded steal rolling pin of the bolt will provide extra protection to all the users of this deadlatch. Boxed.