The assortment in the form of DR inspection door used in single and multi-family construction as building cavities dedicated to water meters, heat meters, gas meters or other ICT media. The inspection door are made of traditional sheet metal, suitably designed and the multiple bending ensures good stability and prevents deformation. Each door is protected in the production process and painted with polyester varnish in standard RAL 7035 color. Yale 9081 is the standard lock and its number depends on the door height. Inspection doors are made in the p/t version and have so-called side rebars to attach the entire structure to the wall.