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With nail scissors, carefully clamp a little and pull it out. I've broken the key before, and that's how I got it. Pay attention to the use of that kind of beveled nail clippers, the contact area is small, easy to operate.
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Suck with a strong iron suction, otherwise you have to find a locksmith.
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You start by gently clamping with tweezers (available at drug stores). If you don't succeed, you can only find a lock picking company, remember to buy a lock for him to change, and I wish you to use tweezers to clip it out.
Use a magnet or glue dipped in glue into the key hole to take out the broken one.
It's hard to figure it out yourself, so let's find a lockpicker.
The word insurance is automatic inside the lock. If you want to open it, you can only open it by manually pressing the insurance if the door is already open.
Can't open it. It takes about 100 to open the security door. It depends on the place. There will be different ones. You don't need to change the locks.
I couldn't open it outside with a key, and I had a similar situation a while ago, and finally found a lock from a lockpicking company.