The lifting and sliding doors (HST) are the quintessence of functionality and elegance. Large glass surfaces give the interiors truly unique quality. Sliding doors ensure complete freedom in arranging rooms. In contrast to the standard side hung doors, their wing slides parallel along the guide, and does not take up any of the valuable floor space. Sliding doors also have this advantage over the ordinary balcony doors, that they do not shut by themselves due to strong wind or draft. Doors of this type are very often selected for the passages to a terrace or to a winter garden. When opened, the doors allow you to perfectly interconnect your bedroom or a living room with the exterior of the building. Another advantage of sliding doors is their low threshold – convenient and safe.