At present, the door locks are generally divided into three levels: A-level, B-class, and super-B-level. The criminals are mainly aimed at the traditional A-class locks, while the technology of the super-B-locks is relatively difficult to open. The criminals encounter super Class B locks are generally ignored. "The criminals are most afraid to spend a long time unlocking. If the home is still a traditional A-class lock cylinder, it is best to replace the super-B lock cylinder to improve the over