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It's not troublesome, but it's best to find a professional company to do it, because the general lock stamen can also be used, but the lock stamen will not fit well after a long time.
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It's more complicated, ask someone who specializes in unlocking to help you change it, don't ask someone else to do it.
The person who specializes in unlocking is generally prepared.
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It's not complicated, this requires you to remember how to disassemble it when you disassemble it, and how to put it back on.
1. Unscrew down the two screws on and below the pull handle panel; >>>More
It's quite simple to change the lock cylinder of the anti-theft door, just a diagram.
In fact, it doesn't work to change any lock and break down the door violently. >>>More
You can directly change the lock cylinder, the standards for this part should be unified, buy a lock cylinder yourself, and let the master change it
Check it online, and you can change the lock if you find a regular registration, and the security is also high. >>>More