Security padlock due to the function of management, a padlock can be matched with a number of keys, these keys due to different functions and permissions, so divided into a variety of, usually these keys constitute a security padlock key management system:

Key series: Each security padlock has a unique key, lock and lock can not open each other;

Open key series: All the security padlocks and security padlocks in the group can be opened each other, and any one or several keys can open all padlocks in the group. Multiple groups can be specified and cannot be opened between groups;

Different opening master key series: each security padlock in the designated group has a unique key, and the security padlock and the security padlock cannot be opened between each other, but there is a master key that can open all the security padlocks in the group; Multiple groups can be customized, and the master key cannot be opened between the groups, but the higher main key can be specified to open the padlock in all groups;

Same open master key series: After multiple groups of the same open key series in the group, if you need to designate a higher supervisor to open all groups, you can add the same open master key.