Operation: Smooth opening and closing with reduced noise levels. Appearance: Invisible hinges after installation for a seamless look. Security: Designed for concealed doors, limiting external access to hinge components. Gap: Reduced gap between moving and fixed door panels for a consistent appearance. Applications: Suitable for wooden boxes, cabinets, folding tables, folding doors, revolving doors, and concealed fireproof doors., Manufacturer: FOELANNE