The anti theft door is closed, the door is less than 2 gears, and the door can be fully locked, how

Change the lock cylinder, and the lock cylinder can be opened when you change it.

It could be that the lock is stuck in the door, so find a plier or a wrench and loosen the door a little bit.

Usually buy this kind of products, the manufacturer of the anti-theft door will purchase product quality liability insurance from the insurance company for the publicity of the manufacturer's reputation and the affirmation of the quality, that is, the user of the product suffers property or personal losses due to the quality of the product, and the regular insurance company underwrites this type of insurance will require the manufacturer to issue product quality certification and production license and certificate of conformity and other documents that can prove the legality of product production and sales and quality. Therefore, if a brand of anti-theft door advertised (the company's products are underwritten by XXX insurance company product quality insurance), it can be considered a qualified product, of course, you should pay attention to the company underwritten for it is best to be a company above the municipal level, which may be more stringent. Of course, the security door may be concentrated in some big brands, and the importance of the brand is self-evident.

Call 110 and ask the police uncle to help you find a professional lockpicker, or find a professional lockpicker on the street yourself.

Generally speaking, the main difference between burglar and fire protection of entrance doors is that the filling is different, security doors are usually filled with honeycomb paper or polyurethane foam, and fire doors are usually filled with expanded perlite slabs. Entrance doors usually have the function of anti-theft doors.