We all know that anti-theft doors are very important at home, and people are paying more and more attention to safety, especially anti-theft doors and locks. To ensure safety, anti-theft chains can be added to the home appropriately. Locks are very important when choosing anti-theft doors. For us ordinary citizens, how to determine the level of anti-theft locks based on the anti-theft lock?

The anti-theft locks currently in use are divided into three levels: A level, B level, and super B level. The level determination of anti-theft door lock cylinder can be distinguished from the key.

Anti theft lock level: A-level lock

At present, the A-grade anti-theft lock keys on the market mainly include single key and cross key. The internal structure of the A-grade lock cylinder is very simple, limited to the variation of the pins, with few and shallow pin slots. Within 1 minute of technical activation, the mutual activation rate is extremely high. The pin structure is a single row of pins or a cross lock.

Anti theft lock level: B-level lock

B-class lock keys are flat keys with double row pin slots. The difference from A-class locks is that the key face has an additional row of curved and irregular lines. There are three main types of lock cores: computer double row lock core, double row crescent lock core, and double-sided blade lock core. Within 5 minutes of technical activation, the mutual activation rate is high. By using a strong torque tool, the lock cylinder can be opened within 1 minute.

Generally, most of the uniformly configured lock cores in residential areas nowadays are A-grade or B-grade anti-theft lock cores with low anti technology activation. According to national standards, the opening time of A-level lock core anti technology is 1 minute, and the opening time of B-level lock core anti technology is 5 minutes. However, in just a few minutes, it is impossible to resist the high intelligence unlocking tools used by thieves nowadays. The common A-level anti-theft lock cylinder can be unlocked in just a few seconds by thieves using tin foil in conjunction with the tool when locked.

Anti theft lock level: Super B-level lock

The key shape is a single-sided blade inner milling groove or outer milling groove key, and the lock core type is a side column lock core; After testing by the Ministry of Public Security, it was found that the technology could not be opened for 270 minutes, and the mutual opening rate of the area was zero (one in 16 million). The marble structure consists of double row blades and V-shaped edge columns for locking; If a strong twisting tool is used to open the lock cylinder, the interior of the lock cylinder will be damaged, self destructing and locking, resulting in the inability to open. Due to its difficulty in opening and high anti-theft coefficient, it is recommended to use a B-grade lock for home anti-theft.