There is a concept of "mutual opening rate" in the production of locks. According to the different purposes of locks, the mutual opening rate has corresponding national standards. According to the safety requirements, it varies from a few percent to a few thousandths, ten thousandths or even higher.
When the anti-theft door lock is in production, according to the processing accuracy and the number of beads, the manufacturer knows the maximum combination number in advance. According to this arrangement and combination, the continuous cycle production has the mutual opening rate. Mutual opening rate refers to the proportion of mutual opening of a certain number of locks (the percentage of the quotient of the number of opened times and the total number of trial opening) within a specified time in the same batch of locks.
The fewer locks a key opens, the stronger the security and reliability of the lock. The strength of well-known lock brands is strong, and the mutual opening rate of locks is only a few tens of thousands of times, while the mutual opening rate of products of some irregular and weak manufacturers may reach a few tens of times, which means that these manufacturers may only have dozens of sets of mold to produce locks
