HERA is made of galvanized steel and painted with oven-dried epoxy polymerized powders at a temperature of 200°. The joints on the leaf are part of the vertical bars and keep the design uniform, also in the models with fixed wings. The joints allow a easy opening of the leaf and a solid fixing on the pivot, recessed or concealed, on the upper or lower crosspiece. It consists of a outer frame with compensator for setting the out-of-square. You can install it by using the provided expansion small blocks. The frame can be customized in the height of the horizontal upper or lower crosspiece. The 180° joint enables obstacles near the doorstep or near the external wall, such as shutter pins, frame fixtures, shutter frames, housing screens mosquito, ecc. , to be overcome. The joints are made of galvanized steel and tightly fixed to the tubular member of the horizontal crosspiece.