To date, among the existing types of door locks, there are several of the most widely used. These types include: suspended locks, mortise, as well as overhead locks. As a rule, these types of locks are used for iron types of entrance doors. Suwl and mortise became the most popular among other types of cutting castles. Well, the CISA electromechanical locks, which are popularly called “smart” can be taken into a separate, most promising.