In the process of continuous social progress, people's awareness of prevention has also greatly improved. However, in recent years, there have been many theft cases where anti-theft doors in homes are unlocked by technology or violence. In order to help citizens improve the security of anti-theft doors, the Peninsula Urban Daily's "Jiaozhou News" will soon carry out activities related to the security of anti-theft door locks, in order to maximize the security of citizens' own anti-theft door locks and reduce the possibility of theft.

The reporter learned from some lock markets that locks can generally be divided into three levels: A level, B level, and super B level. The simplest way to distinguish them is to look at the key of your own door lock. Generally, A level only has one row of locking teeth, B level has two rows of locking teeth, and super B level has three rows of locking teeth or only two rows of locking teeth, plus an anti shift snake shaped groove.

At present, most residential households use A-grade or B-grade locks with low anti-theft performance. A-grade lock keys mainly include straight and cross keys, with a very simple internal structure and an anti technical opening time of less than 1 minute, with a very high mutual opening rate. B-grade lock keys are flat keys with double row pin slots and an anti technical opening time of less than 5 minutes, with a low mutual opening rate A staff member from a lock production company introduced that the currently developed super B-class lock key has a single-sided blade inner milling groove or outer milling groove shape, and the lock core type is edge column lock core. The mutual opening rate is extremely low. If a strong torque tool is used to open the lock core, the internal of the lock core will be damaged, and it will self destruct and lock, resulting in the inability to open.

The reporter learned that installing B-grade locks and other door and window security products can effectively extend the time for technical unlocking or violent unlocking, and is currently the best choice for home anti-theft.