A-level locks: Technical unlocking time is less than 1 minute
A-level locks mostly use one-word keys or cross keys. Crescent locks and most lock cylinders only have one row of marbles inside. Structural lock. Its internal structure is very simple. It only relies on the change of marbles to lock and unlock. The number of marble slots is small and shallow, and the mutual opening rate is also very high. Tested by professionals, the technical unlocking time of a Class A lock is within 30 seconds.
Zigzag key, cross flower key, single row marble key
*The shape of the A-level lock key is flat or crescent, with a row of concave key grooves or crosses on one or both sides. There are convex key slots on all four sides;
That is to say, if your door is equipped with a Class A lock, a thief can open it in less than 1 minute!
Class B lock: technical unlocking time is more than 5 minutes
The key of Class B lock is flat and has a double row of pin slots. Compared with Class A lock, it has an additional row of curved pins. Regular lines. There are three main types of lock cylinders: computer double-row lock cylinders, double-row crescent lock cylinders, and double-sided blade lock cylinders. Tested by professionals, the technical unlocking time of Class B locks is between more than 5 minutes and less than 120 minutes.
Double-row pin locks
*The key shape of Class B locks is flat or crescent, with two rows of concave key grooves or cylindrical multi-point concave shapes on one or both sides. Keyhole;
According to relevant surveys, 90% of thieves will give up if they cannot open the door lock within one minute. Therefore, although Class B locks are not the highest level, they are safer than Class A locks. Much higher.
C-level lock: The technical unlocking time is more than 270 minutes
The key of C-level lock uses a double row, computer, compound curve groove patented key. In theory, the technical unlocking time can reach With more than 270 minutes, it is the lock cylinder with the highest safety factor at present. Unless it is violently destroyed, the possibility of being stolen is very small.
Full blade key with internal milling teeth
The C-class lock key used in Aqara smart door lock S2 has a flat key shape with two rows of concave shapes on one or both sides. Add an S-shaped keyway, or an inner and outer double snake-shaped keyway.