Superior Brass French Door Square Fastener Door Fastener is commonly used in residential and commercial settings for securing French doors, patio doors, and other double-door configurations. Door Fastener Function - secures the doors tightly together, enhancing both the aesthetic and security of the entrance. Features: Made from high-quality materials for long-lasting performance Provides a strong locking mechanism to secure doors tightly Ensures effortless opening and closing of doors Made from high-quality materials for long-lasting performance Specifications: Size: 100mm Material: Solid Brass Projection: 36mm Available Finish: Antique Copper Black Chrome Plate Polished Brass Satin Chrome