Is your door lock safe? Experts teach you to "look at the key and recognize the lock"

It is almost the New Year, and many people have to go out to go to relatives, return to their hometowns, or travel. However, before leaving home, have you considered whether the lock of your door is safe? Recently, a "9 kinds of key security classification map" was posted on Weibo to teach you to identify the security level of the lock through the key. The first one is the cross lock and key currently serving on the doors of many people. What is less known is that keys are classified according to security level, from low to high, and are divided into three categories: A, B, and C-and our most common cross key is actually the lowest and most unsafe.

However, the reporter learned in the interview that of the keys on this picture on Weibo, only one of the cross keys is listed as a recommended replacement, three are recommended for upgrades, and five are classified as security levels .

A locksmith in Nanjing reveals the secret

The "ABC security rating" of this kind of lock convinced a group of netizens, and many people shouted: "Hurry home this weekend to change the lock!" So, do old-style locks have to be replaced? What is the best lock currently on the market? The reporter asked the professional unlockers and the police to explain.

It is safer to replace some old-fashioned locks with cross locks and flat locks

Most reports believe that the lock fitted with the cross key is the easiest to be opened by a thief. However, a master of Nanjing's 110 locksmith, Cai Ning, believes that opening the cross lock is not as easy as the online introduction. Such a lock also requires professional tools, and ordinary people can't get it; and the first one shown in the class B lock "One word key" is really easy to open. Cai Ning suggested replacing the cross locks in level A and the single-row locks in level B.

But he told reporters that it does not mean that the simpler the key, the worse the security of the lock. On the contrary, some lock cores 20 years ago even used single-sided serrated keys. Because the pin spacing is different from modern locks, it is more difficult for thieves to open the lock, because its lock core design is very clever.

Some locks only need to change the lock core. Good C-level lock cores are more than 200 yuan.

Just from the point of view of the complexity of the key, the cost of the B-level lock is higher than the A-level, and the C-level lock is higher than the B-level. Cai Ning said that at present, the better properties in Nanjing have adopted C-level locks.

He introduced to reporters that in addition to the low-level locks that are recommended to be completely replaced, other B \ C-level locks can actually only replace the lock core, while retaining the original "look frame" of the lock, which can save some money-can a lock be Anti-theft, the lock core plays a decisive role.

The quality of lock cylinders is also uneven in the market, and residents should pay attention to identification when purchasing lock cylinders. "First-class price and first-class goods", Cai Ning said, the current set of cross lock cylinders is only a dozen yuan or tens of yuan; while the C-level double-row lock cylinders are set at 150 yuan, and the crescent double-row or multi-row locks A set of cores is more than 200 yuan, and a set of double-row anti-pulling and three-row anti-pulling lock cores is about 260 yuan.

In addition, the material of the lock core should be observed. The good lock core is pure copper, and the poor quality lock core contains plastic-you can identify it by weighing it in your hand. At present, the relatively high-end stainless steel spike locks on the market are relatively expensive, and citizens can choose according to their own actual situation.

■ Special reminder——

The door should be locked at night

"Actually, most of the stolen people are not the thieves who have mastered the superb technology, but the residents have neglected themselves." Cai Ning said.

This view Qixi Criminal Police Wen Xiurong agrees. She said that from recent personal experience, so-called "technical" thieves unlocked are few, and thieves like the following are more common: use a soft-faced shell, cut it into a certain shape, you can cut The anti-theft door opens. However, the reason for the opening was that the occupants did not lock the door back, so that the thieves used a plastic shell with a certain shape, which hooked the lock tongue.

"Some residents are good at seeing doors and windows after being stolen at night. They suspect that the thieves used a master key. In fact, many times because the door is not locked inside, the thieves can open it with some equipment."

The door and the doorway of the lock are finished, but the security of the living room is not completely locked by an iron general. Officer Wen also provided some tips-

● At the end of the year or the Spring Festival, residents who go out may wish to hang some clothes on the balcony, so that it is not easy for the thieves to judge whether there is someone in your house.

● If you go out for a short time at night, you may wish to light a lamp at home; you can also install an infrared anti-theft alarm at home.

● In addition to these, the most important thing is to close the doors and windows, and lock the anti-theft doors in time.

● Some old-fashioned anti-theft iron doors and wooden doors are combined. Even if the lock core is not high-end, you can also install a bolt to lock. The thief will choose to give up if the procedures are complicated.