Analyze the security door lock core consumers do not be the manufacturer's hoe
Recently, @Zhejiang Public Security and @PingHangHangzhou on Weibo shared a post to educate the public on how to identify the security level of a door lock. The first example shown is the common cross-shaped lock that many people still use on their doors. According to experts, a skilled thief can easily pick this type of lock using simple tools like wires or aluminum foil in under a minute.
In April of this year, a series of 32 theft cases in Weihai City sparked widespread public concern. After investigation, police confirmed that these incidents were all due to technical unlocking methods. Thieves used tools like "tweezing paper" to repeatedly break into homes. The stolen properties were typically protected by low-level locks such as "A" shape, "cross" shape, or ordinary computer keys, which are easy to bypass.
Currently, security door lock cores are mainly categorized into A, B, and super B grades. A-class and B-class locks are primarily made with a marble structure, offering relatively low anti-theft performance. The national standard for resisting technical opening is only 1 to 5 minutes. In contrast, super B-grade locks feature a large blade design and high-security keys, making it take over 260 minutes for a thief to open them. However, some manufacturers claim to offer "C-class" locks, but there is no official national standard for C-class locks — they are merely marketing gimmicks.
**The super B-class lock cylinder has now been upgraded.**
According to lock experts, even the current super B-class lock cylinders have undergone significant improvements. These upgraded cores now include anti-twist and anti-idling designs, making it nearly impossible for thieves to start picking them. If equipped with top-tier anti-destructive panels, even amateur burglars would struggle to make progress.
Most security doors currently installed in projects still use A-grade lock cores. Experts recommend that the public consider upgrading to higher-level super B-class lock cores to enhance home security.
**When choosing a security door, understanding the key is essential.**
In addition to the lock itself, the public should pay attention to the key when selecting a security door. Many steel doors, metal doors, and entrance doors on the market are produced according to enterprise standards and are not considered true security doors. According to official regulations, security doors are divided into three levels: A, B, and C. A genuine security door must pass tests conducted by authorized agencies and be issued a security product production permit by provincial public security departments.
The anti-theft performance of a security door largely depends on its key and lock system. A qualified security door typically uses a three-point locking mechanism, ensuring the door is locked not just at the handle, but also through the upper and lower frames to secure the door more effectively.
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