The security door glass is broken

Buy a pair of metric Allen wrenches, loosen the screws, put the doorknob in place, and then reset the screws and tighten them.

Panpan anti-theft door is good, it is a big brand, it is right to choose Panpan, Buyang. The dragon armor is good, they are broken, see if it is a big problem, you find a merchant to take a look, and then make a decision whether to change it.

Is it your own or your unit's building intercom doorbell? If the intercom doorbell of the unit is really broken, it is not a professional who is generally not good to repair, you can contact the property, the door is installed by them, they are connected with the manufacturer of the doorbell, if there are difficulties in the property, you will see which manufacturer is the manufacturer, and contact them directly! >>>More

You can go to Youku to search for a master key that can't be "locked" to see if the lock at home will be opened by thieves. Then go to Taobao to search, the home of the railway home online store to see, I feel that his super B anti-theft lock cylinder is very safe, hehe.

Find a locksmith and solve it, he just won't tell you on the Internet, or will he still do this business?!