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There are ordinary A-grade and medium-B grade C-grade alternatives on the market that can be replaced by C-grade gold dot atoms.
1. A-level anti-theft door lock cylinder A-level anti-theft door lock cylinder is still relatively ordinary anti-theft, mainly a word key and a cross key, the internal structure is also relatively simple, and the change is only in the change of the marble, and the marble groove is few and shallow. This type of door cylinder has an extremely high rate of mutual opening. The marble structure is a single row of marbles or cross locks. >>>More
The lock cylinder grade is generally divided into: A, B, super B, the so-called C grade and super C grade on the market are actually derived in the field of super B.
1. What is a Class B anti-theft lock?
Understand that it is not so easy for B-class locks. In other words, the more complex the cylinder, the longer it will take to unlock. Most of the home security doors on the market are Class B locks. >>>More
My lock is broken, and the lock company says that the hottest thing now is one plus one lock heart, and it's very easy to use it.
At present, the highest anti-theft level in China is C-level, and the so-called super C-level and D-level are all fake.