Listen, you are knocking on the anti-theft door with your fingers and listening to the sound of the knock.

Measuring means measuring the thickness of the door frame. The thickness of the door frame can be measured from the position of the door frame keyhole. This thickness must exceed 2 mm.

Weigh it, just weigh the weight of the door body. The overall weight of the anti-theft door produced in regular processes will not be less than 60 kilograms. If the door body is obviously too light, it means that the manufacturer is likely to have tampered with the thickness of the steel plate and the internal filling.

Look, it means looking at the anti-theft door inspection report issued by the quality inspection department. It is crucial that the seller produces the inspection report of the security door that year. Because there are many names on the market now, the inspection report of the anti-theft security door must be presented.