Anti-theft door lock lock core several, the kind of the most secure.
1.A-level lock cylinder, technology to open the time within 1 minute. A-level lock cylinder is the old-fashioned lock cylinder, the key is a cross-flat or crescent-shaped convex keyway key, single or double-sided with a row of concave spoon, this type of thief with tin foil can be within a few seconds You can open, if your home or use this key quickly changed. A-level lock cylinder has been unable to prevent the thief. 2.B-level lock cylinder, the technology to open the floating bucket of the first dry dry sucking nail time within 5 minutes. B-type lock cylinder key for the flat or crescent type, B-level lock key than the A-level key to complex, the key slot for the single or double-sided two rows of concave or cylindrical multi-point concave keyhole. 3. Super B-level lock core, the technology can not be opened or technology to open more than 270 minutes. Also known as the C-level cylinder, that is, more than the meaning of security B level. Super B-class lock cylinder key for the flat type, key groove for the single or double-sided with two rows of concave plus S-shaped, or inside and outside the double snake-type internal milling structure. Is the most complex lock cylinder, is also the most secure lock cylinder, tool open time in 270 minutes or more can not even open. Now use the lock cylinder is best to use super B-class lock cylinder. Home hotline on the king of the security door of the mini-cylinder is to force.
Oh, no matter what kind of anti-lock lock cylinder, for professionals who are the same degree of security, open the same degree of difficulty are the same. I suggest you choose their favorite on the European friends.
Today did not bring the key, please open the lock, the master said Wang Li door most difficult to open almost open, my door actually opened three minutes, silent
