Since unlocking technology is no secret, how do you buy a safe door lock for the public?
The locksmith demonstrates that it takes only three or four seconds to open a normal door lock. The safety of the lock is the most important. The professional locksmith has the most say. A few days ago, in the west bridge of Yunnan North Road in Gulou District, I found Chen Wei, a professional locksmith with 110 unlocking qualifications.
How fast is the technical unlocking? Chen Wei and his assistant Chen Daochun gave a demonstration. Chen Daochun demonstrated the tin foil unlocking method. He found an ordinary door lock (the key is a figure), let the lock and remove the key.
Then, Chen Daochun took out a long piece of iron resembling a word key and took out a thin tin strip. Before unlocking, he put the tin foil on the raised groove of the iron bump, then extended into the lock cylinder and repeatedly swayed up and down. After the failure to use two tin foils in succession, Chen Daochun took out the third tin foil. After a few shakings, the lock was smoothly opened. The whole process is only about 3 minutes.
The tin foil unlocking method is not too fast. Chen Wei then demonstrated the special tool unlocking method. He found another ordinary door lock that was still locked. Chen Wei took out a tool box and chose a small tool similar to the "ear spoon". Before he could press the timer, he only listened to Chen Wei and shouted "One Two Three, Open!" The door lock opened.
"These are the A-level locks commonly used in the home, some are the one-shaped key, and the other is the cross-shaped key." Chen Wei said that the A-level lock and the B-class lock are relatively poor in anti-theft performance, in front of the technical unlocking personnel, a few seconds to It can be easily opened in a few minutes.
Police reminder: It is best to buy super B-class locks
According to the police, the door locks commonly used in Nanjing households and in the market are classified into three categories according to safety: Class A, Class B, and Class B. Among them, about 70% of the common door locks are A-class locks.
A-level lock, B-level lock, and super-B lock can be seen from the key. According to police sources, Class A locks are single-row double-sided punching. The usage rate is high but the anti-theft performance is poor. Skilled workers can usually open in two or three minutes or even seconds; Class B locks are double-row single-sided punching and unlocking. It is difficult to unlock a tool with a tool and a technology. It usually takes 5-10 minutes.
The Super B-class lock is a key with two rows of marbled blades with a relatively high safety factor. "Even a skilled unlocking master, it takes at least one hour to open a super B-class lock." Chen Wei said that the lock cylinder of the super-B lock is a blade lock, the key is an inner milling slot, and the lock cylinder is fitted with a steel plate. Can prevent violent shackles.
It is reported that from the current proportion of use, the average citizen uses only Super B-class locks only about 10%. "It can be said that locksmiths all over the country are studying super-B locks, and hope to crack the super-B lock unlocking problem, but so far, no one can quickly open the super-B lock," he said.
The anti-theft performance is good and the price is naturally relatively high. It is learned that at present, the market price of A-class lock is about 100 yuan, the market price of B-class lock is about 200 yuan, and the market price of super-B lock is about three or four hundred yuan.
"It is recommended that the public install Super B-class locks, improve the safety level of locks, and increase the difficulty of technical unlocking, so as to effectively protect their lives and property safety." Police sources said.
Password lock iris lock, easy to use but not anti-theft performance
In the lock market, in addition to conventional locks, there are high-grade locks such as fingerprint locks and password locks. In addition, in many high-end villas, there are also households installing iris locks that use the shape of the eyeball to unlock. What is the anti-theft performance of these locks?
In this regard, Chen Wei said that fingerprint locks, password locks and other high-end locks, the main features are easy to use, anti-theft performance is not necessarily strong. "For a security door, the lock is the heart; for a lock, the lock core determines the level of anti-theft performance." He said that locks such as iris locks are more intelligent, and the opening method is different from ordinary locks, but theft prevention. Performance still depends on the lock cylinder level. “If the high-grade lock uses the lock cylinder of the A-class lock, the anti-theft performance is still very low, and the technical unlocking personnel can easily open it.â€
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