Steel doors – security guarantee. There is a direct meaning in this saying, so – as modern steel doors can really guarantee the safety of the owner, both apartments and a private house. Steel doors exist both internal and external. Internal steel doors are adapted for installation in apartments, residential high -rise buildings. The internal steel doors are reliable and adapted to extraneous influences, but alas, they are not adapted to environmental influences. External steel or aluminum doors are installed outside the house, apartments. The outer doors of steel are reliable, as it is unlikely that an attacker can damage or open the outer steel doors, the doors are also very resistant to various kinds of climatic conditions, under the influence of sunlight, rain, snow and other factors – steel external doors are persistent And durable. Thanks to protective coatings on the surface of the outer steel door, it is quite difficult to damage its surface: leave a scratch, or dent. External steel doors are used for installation both in high -rise buildings, offices, banks, warehouses, and in other rooms. Steel, entrance doors not in vain earned glory truly reliable and safe doors, so – as with these doors made of high -strength metal and steel – any room will be in complete safety.