Based on many years of experience, Harutyunyan recommends: “When installing a new door, it is advisable to insert non -binding locks that are fixed with a latch and closed exclusively with the key. I advise you to store the existing duplicates of the keys in a separate place, so that, if necessary, to be able to use them. And yet. Just in case, always have the coordinates of the master, who can open a slaughtered door «.