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Now that the A lock has a master key, it is recommended that you upgrade it directly, anti-theft, you can check the tin foil on the Internet to open the lock.
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If you have deep feelings, change the lock cylinder, not to mention that it is expensive to buy a new one
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It is better to change the lock cylinder directly with the key, the lock cylinder is cheap and you can change it yourself.
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Unless you have a spare key, you'll have to change the lock cylinder.
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Change the three-edged key, anti-theft, can be better.
Professional unlockers can unravel it, no problem.
The core component of the security door is the lock cylinder, and the door is safe after replacing the new lock cylinder.
You can go to the place where you bought the security door, buy the lock cylinder there, and then ask the boss to arrange a professional decorator. Maybe the boss will give you a certain discount because you are a repeat customer.
When you have time, remove your lock first and take it to another decoration hardware store. >>>More
Find a professional to open the anti-theft door to change the lock, there are advertisements everywhere in the community, about 120 to 200 yuan.