The security door expands the Rose with a few gauge sleeves

If the new security door screw opening is exactly the same as the old one, it is more troublesome, it is better to consult the installer, they will have a way. Be careful of the old screw plugging in, unscrew the old expansion screw, gently put the screw into it a little, and then pull out the outer sleeve with pliers, and then take out the screw.

I had to drill it off.

Look at how you compare, if they are all the same level to compare, in fact, it is almost the same, for example, if both are Class A security doors, because the current standards used by various manufacturers are GB17565-2007 standards, so the gap will not be too big, and then look at the locks and fillings. >>>More

In the basic principle, I agree with the suggestion of the previous friend, and the expansion screw of the anti-theft door should generally be tightened according to the method and torque value required by the manufacturer.

Specifications of the expansion screws of the security door. >>>More