What we see in the building materials market are mostly C-class and D-class security doors, which are more suitable for ordinary families.
2. Inspection of steel plate: According to the national regulations, the steel plate thickness of security door should reach 1mm, but some enterprises only use 0.4mm steel plate to reduce costs, and the thin steel plate will lose the significance of anti-theft.
According to security door merchants, consumers can press the steel plate on the door leaf when checking the steel plate. If the steel plate is pressed, it means that the quality of the security door is not good.
3. Inspection waste: The waste of qualified security doors is stainless steel, but some small workshops actually use stainless steel in order to reduce costs.
When the author visited Nanchang Xinduo security door, the boss introduced a little skill of identification. He put the magnet on the next step. If the magnet is difficult to remove, it means that the next material is unqualified.
4. Good locks are not just many locks: security doors with qualified locks generally use three-way locks, not only the door locks, but also the upper and lower guide rails can be inserted and locked to fix the doors.
Usually, some businesses use more locks to attract consumers. In fact, the more locks the better. The lock core is not anti-theft, and no amount of locks are useless.