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Most of the places where security doors are sold have lock cylinders, and of course, there are also places to repair locks.
Where hardware is sold, there are lock cylinders that are sold.
It's advertising again, don't go, it's all liars.
1. Shops that sell security doors.
2. Online purchase. >>>More
The size of the lock cylinder of the anti-theft door, if you have a strong hands-on ability, you can remove it and measure it, based on the distance between the middle screw hole and the two keyholes, of course, if you are troublesome, you can simply measure it, as shown in the figure below, you only need to measure L1 + L2. >>>More
Now the blade lock is ok. High level of anti-theft.
It mainly depends on what kind of door you are. This should also be matched. >>>More