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Dear, the double-sided serpentine groove is better, it must be double-sided blades. And it's also more convenient to use, so you don't have to worry about which side is heads and tails. If you choose, you can consider the Saidian brand double-sided blade idling super B-level anti-theft lock cylinder supervised by the expert committee of China's lock industry.
It's very good.
It's not that the serpentine groove is good, the lock cylinder level is divided according to the grade, mainly the A B super B lock cylinder, the super B lock cylinder is currently the highest level of the lock cylinder, that is, the so-called C-level snake lock cylinder on the market, in addition to password locks and fingerprint locks.
Of course, the serpentine spring is better, strong and durable, and has good elasticity >>>More
Personally, I think it is good for solid wood, at least the service life is generally much higher than that of springs. >>>More
It is good to have a serpentine spring in the sofa, which can increase the elasticity and have a comfortable feeling.
If you lose the key, it is best to change the lock cylinder. Be on the safe side.