We supply fire-rated certified heavy-duty models,  versions and 360-degree rotating options, equipped with silent internal bearings for smooth long-term operation. These rust-resistant hinges ideal for wooden fire doors, interior passage doors and engineering access panels for residential, hotel and commercial buildings. Strict quality control ensures stable load performance, while we offer OEM custom sizes, laser marking and exclusive packaging, delivering fast sampling and cost-effective bulk orders to global door manufacturers and hardware distributors.