Can the security door be locked without a key, and it costs a lot of money?

There is a barrel of thin steel plate on the outside of Wang Limen's cat's eye, which is welded, and it is impossible to unlock it from here. I also use Wang Limen.

There are several stiffeners in the interlayer of the door body of the anti-theft door, and filled with foaming agent, rock wool and other fillers, rock wool is the material that can be soundproofed, but there are also anti-theft doors that do not put rock wool, the sound insulation effect of such an anti-theft door will be much worse, you want to modify the anti-theft door is a little difficult, the best way is to install a wooden door.

As long as the door leaf and door frame are in good condition, you can directly change the lock cylinder or lock without changing the door (changing the door is very troublesome).

1. How much does it cost to replace the lock cylinder of the anti-theft door. >>>More

Regular manufacturers generally print furniture brands, sizes, instructions, etc. on the surface of packaging cartons. There is no hard requirement for the furniture itself, it must be labeled, and some manufacturers will have a brand LOGO logo, which is also the manufacturer's own behavior, so please choose a well-known manufacturer to buy furniture is more guaranteed.