Nasta Push Button Lock Collection Mailbox Lock 1 Piece HPK-8

[Patent registered] This is a patented product with new innovations in the shape and structure of the product. Press the C (clear) button, press the preset unlock number (in no particular order), and then press the push button to open the door automatically. When you close the door, it will lock automatically. There are 3-digit and 4-digit unlocking numbers. (The unlock number cannot be changed.) It may not be possible to install depending on the model.