Protective roller shutters

Today, protective roller blinds have become a familiar attribute of the first floors of many buildings, as well as almost all shops, kiosks, banks and other government and commercial institutions. Moreover, ordering shutters and installing them has become common today, because this is a security measure.
Modern protective roller shutters are very different from old wooden ones. Such rolls, as they are also called, are a construction consisting of a web of interconnected horizontal stripes - lamellas, which, with the help of guides fixed vertically along the opening of the guides, are folded onto a special shaft. The latter is hidden in a box, which is placed above the opening.