DIN 7504 K RP-K12-P screws are designed for fastening sandwich panels to a steel substructure. They have a special shape and thread that makes it easier to screw into the material. They are made of high-quality steel, which makes them durable and resistant to weather conditions. These screws are easy to install and provide a stable connection between the panel and the substructure, making them an ideal solution for use in construction.