Does anyone understand door locks? My security door lock has been changed twice in seven years, and

Buy security doors where hardware locks.

Recommend a few Haodi, Golden Point Atom, Baodean, Strength, Yuema, Meilibao, Antai, and Panpan Xiaoshuai Lock.

The so-called BC lock cylinder is just a change of soup and not a change of medicine, the exposed locks are easy to be pried or opened by technology, it is recommended to install M C K invisible remote control lock directly behind the door, no exposed no lock hole, one of the anti-theft weapons, and not afraid of failure, dual system humane design for you to protect your home.

1. Even if it is the same brand of anti-theft door, the lock cylinder used in different batches is also different. Depending on the thickness of the door, the length specifications of the lock cylinder are also different. If you want to change the anti-theft lock cylinder, it is recommended to take a look at the "CEI multi-colored lock cylinder" or "Modila" lock cylinder, both of which have good anti-theft properties. >>>More

You'd better measure the guide piece of your security door, and then go to the building materials market to buy one.