Sliding security gates for doors In a one-family house in Agios Stefanos, north-east of Athens, in a balcony door with a width of four meters, we installed a Viometaloumin two-piece retractable security gate with double steel blades in white colour, with a 180° degree rotation, so that the owner could enjoy the views from his living-room. The width of each piece of the gate, when it is retracted, is not exceeding that of 40 cm. However it has the possibility of a full rotation, so that it cannot become an obstacle for the owner and his guests.