Rolling systems are a more modern option for protective devices. They are metal canvases, which consist of separate, bands fastened with each other and anti -ibal box, which is mounted above the window opening.
Lameli can be roller rolling (produced from a steel or aluminum strip, filled with polyurethane) or aluminum, whole. The former have less weight, but the latter are more stringent to bend and durable. It will not be superfluous to find out about engineering and geological surveys at leisure. They are inexpensively.
Two types of wires use to control roller shutters: manual and automatic. Determines the selection of the drive weight of the protective canvas. Manual -wheel drive can be used for lighter sabers (no more than 35 kg). Electric (automatic) drive involves the presence of a remote control or switch. The distance method is more convenient and expensive.
The roller shutters make it possible to protect their home not only from attackers, but also from bright sunlight, heat and curious views. When lowering the sabers, the entire window opening is tightly closed, which is useful in terms of security, but for people who are indoors, it may not be very convenient.