The extending frame is used to adjust the wiring boxes that are installed too deep below the plaster surface. The advantage of the new solution is the possibility of separating the individual parts with a knife, which allows you to select a height adjustment from 5 to 25 mm. Of course, we can save the remaining rings for further use. The design makes it easy to use even for multiple boxes or for connected boxes with 71mm width. In addition, the frames are halogen-free and can be used in areas with a greater concentration of people.