You are able to buy key screws or wood screws with an hexagonal screw head after DIN 571 in the Klokow- online shop.
Due to a variaty of diameters and sizes of the key screws is it's application area for the wood construction nearly unlimeted. For the carport building or house construction the installation is relativly easy with the help of an hexagonal recess. Also the use of electric screwdrivers is possible.
Key screws after DIN 571 are mostly offered in galvanized steel or less commonly hot- dip galvanized and in stainless- steel. All products of DIN 571 plus the required tools are available in the Klokow online shop.