Is there a hint if the security door is not locked?

1 all the replacement of the lock cylinder is good, the seller can go to ask, there should be accessories, there is no lock shop to buy ah, remember to measure how long your original lock cylinder is, it is best to bring.

Of course, the anti-theft door lock is good, and Fuyu has a lot of anti-theft performance that is very good.

According to the way of locking, the lock can be divided into A, B, C (super B level), A is the most unsafe, 15 minutes can be destroyed, B is 30 minutes, C is more than 4 hours. If you want to buy the best security door, it is recommended to buy a class A security door (the security door has been graded according to A, B, C, D, and the most difficult to destroy the class A security door) class C (super B) lock. The famous brands in the market are: >>>More

Some famous door mute door locks are recommended to go to see the appearance by yourself, as well as the key, the general door locks are quite good, it is recommended to build a dragon to see, some large home building materials shopping malls have big brands. It's a big name, and it won't be bad.

I can open it. If it's so easy to open, it's not called an anti-theft door. In that case, it is opened with one's own fingers. Others can't open it.