Is the security door at home safe? What anti-theft door lock is the safest?

I believe everyone has a certain understanding of its functions. It can be said that it has become the security guard of our modern family. In fact, when you choose a security door, the most important place is its door, and the core is the lock core of the security door. This "heart" shoulders the mission of anti-theft and safety. There are three kinds of lock cores for security doors, and the super-B lock core is the safest. Grade A: the key is flat or crescent-shaped, with a row of concave keyways on one or both sides or convex keyways on the four sides of the cross; Class B: the key is flat or crescent-shaped, with two rows of concave keyways or cylindrical multi-point concave keyways on one or both sides; Super Class B: the key is flat, with two rows of concave S-shaped keyways on one side or both sides, or double serpentine keyways inside and outside; Choice: The safest lock cylinder has been upgraded to Class B and Super Class B. It is best to choose Super Class B when purchasing. When choosing a security door, you can see if the lock they are equipped with is the one mentioned above. This kind of lock will have a good anti-theft effect and much higher security.