4 Inch Self-Closing Spring Door Hinge, 304 Stainless Steel Heavy-Duty Automatic Door Closer Hinge with 90 Degree for Wood Doors

4 Inch Self-Closing Spring Door Hinge, 304 Stainless Steel Heavy-Duty Automatic Door Closer Hinge with 90 Degree for Wood Doors
The 4-inch Invisible Door Spring Hinge is a multi-functional, automatic door closing hinge designed for wooden and other doors, ensuring convenience and security. Crafted from durable 304 stainless steel, the hinge features a built-in self-closing spring with a brushed and black-plated finish, offering excellent rust resistance and high-temperature endurance. Capable of supporting at least 35kg (77 lbs), it is suitable for both interior and exterior doors, including entryways in apartments, hotels, offices, hospitals, schools, and commercial establishments. Certified under EU standards with extensive testing—including fire, overload, load deflection, and fatigue tests—it reliably fits both left and right-handed doors. Its precise positioning allows doors to close automatically at a 90-degree angle, making it ideal for high-traffic areas such as classrooms, warehouses, and utility rooms. Easy to install and versatile, this hinge enhances functionality in numerous residential and commercial applications.