One、What does a Class B lock cylinder mean?
B-grade anti-theft locks are characterized by a double-row and curved design. Unlike A-grade locks, B-grade locks feature additional irregular, curved lines on the keyway. These irregular lines are designed to prevent "tin foil attacks," a common method of lock picking, and are therefore referred to as "tin foil resistant" locks.
Second, are second-class locks safe?
B-level locking technology has an opening time of 5 minutes, with a dedicated technology to prevent foil paper insertion. The difficulty level of opening is slightly higher than that of A-level locks. The B-level lock key is a flat key with two rows of detents, which differs from A-level locks in that the key face has an additional row of irregular, curved lines. The main types of lock cores are: computer double-row lock core, double-row crescent lock core, and double-sided leaf lock core.
Three. Can a locksmith with level B certification open a lock?
Locksmiths can open Class B locks. With the assistance of professional tools, the time required to open a Class B lock is between 5 minutes and 120 minutes. If it is impossible to open the lock, alternative methods such as picking or forcibly opening the lock can be used, which can be completed in approximately 1 minute. Therefore, there is no need to worry about the door being locked due to lost keys.