Xi Antumen lock replacement 8669 844 1 lock core level * * * is divided into three levels, and its security level is arranged as A-B- Super B from low to high, and the lock core level can be preliminarily distinguished from the key. There is only one row of tooth slots on each side of the key of Class A lock core, and two rows of tooth slots on both sides of Class B lock core. Super B-class cogging is completely different from A-class and B-class, and super B-class.

1. What is a class A anti-theft lock?

Technical unlocking time shall not be less than 1 min.

Destructive opening time shall not be less than 15 minutes.

2. what is a class b anti-theft lock?

The technical unlocking time is not less than 5 minutes.

Destructive opening time is not less than 30 minutes.

3. what is a super b-class anti-theft lock?

The technical unlocking time is not less than 260 minutes.

Destructive opening time is not less than 30 minutes.