Rollets were invented to protect windows from burglary, penetration, extra eyes and weather factors. Thanks to various models and control options, it is easy to choose a convenient and aesthetic option for a wide variety of premises and conditions of use. Like any protective mechanism, it is very important that it works smoothly and provides sufficient protection. Unfortunately, any mechanism where there are rubbing and moving parts in contact with the external environment or intensively used often breaks. Most often, the mechanisms for lifting the canvas, the canvas itself, the closing locks, which are under constant weather influence, are subject to wear. Low temperature, flying dust, mud falling into the movable elements of the roller shutters bring their breakdown closer and make the repair of the roller shutters inevitable. Sometimes it is very important to close protective shutters at night, for example, if they protect a point of sale or a shop window.