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Anonymous users2024-01-241. Steel is relatively cheap (relative to other metals).
2. The density of steel is relatively high and relatively hard.
3. The melting point of steel is large and relatively stable.
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Anonymous users2024-01-23Steel is cheap, strong, tough, and not easily destroyed.
Of course, there are other more robust materials to make of.
It depends on which anti-theft door you bought, some anti-theft doors can be locked with a key, and some are locked by twisting the knob.
Since they are all called backup keys, they must be used to mechanically unlock the door when it can't be opened intelligently.
Where is your home? Has it been raining a lot lately? If the weather is humid and there may be a little rust inside, get some pencil end to try, or oil. >>>More
Of course, the anti-theft door lock is good, and Fuyu has a lot of anti-theft performance that is very good.
Anti-theft door Wang Li is still good, automatic anti-theft, automatic lock door, particularly convenient to use, China's first brand of anti-theft door, if the decoration budget is enough, you can buy this brand of anti-theft door, although the price is a bit expensive, but it is worth the money.