Identification standards for good or bad security doors:
1. Check the bottom step: Qualified anti-theft door bottom steps are made of stainless steel, but some small workshops use stainless iron in order to reduce costs. When the author visited Xinduo Security Door in Nanchang, the boss introduced a tip for identification. Put the magnet on the lower step. If the magnet is stuck and difficult to remove, it means that the material of the lower step is unqualified.
2. Inspect the steel plate: According to the security door merchants, when consumers inspect the steel plate, they can press the steel plate in the door leaf. If the steel plate is pressed down, it means that the quality of the security door is not up to standard. The state stipulates that the thickness of the steel plate for anti-theft doors must reach 1 mm. However, in order to reduce costs, some companies only use 0.4 mm steel plates. Thin plates lose the meaning of anti-theft.
3. Grade standard: The security level of anti-theft doors can be divided into Class A, Class B, Class C and Class D. Among them, Class A has the highest anti-theft performance, followed by Class B and C, and Class D is the lowest. Most of the doors seen in the building materials market are Class C and Class D security doors, which are more suitable for ordinary families.
4. A good lock not only has many locking points: Anti-theft doors with qualified locks generally use three-position locks. Not only the door lock is locked, but the upper and lower crossbars can be inserted into the lock to secure the door. Some merchants often use more locks to attract consumers. In fact, a good lock does not mean more lock points, the better. If the lock cylinder is not anti-theft, more lock points will be useless.