SOFT OPENING AND CLOSING:This product is 4 inch Door Hinges. It features an improved design with built-in ball bearings. The door opens or closes silently after a quiet and noiseless process. The spherical shaft design effectively ensures the smooth and flexible door opening effect and the retaining effect, and the door opens smoothly. GOOD DURABILITY:The stainless steel hinge is made of 304 stainless steel, so it is corrosion-resistant and not easy to rust. The brushed surface is smooth and can be used indoors and outdoors. The ball and bearing are tightly combined to act as a buffer door. EASY TO INSTALL:The package includes high-quality mounting hardware for quick and easy installation. It comes with compatible screws to meet your needs and can be installed in minutes. The plate-forming material is sufficient, the force area is large, the bearing capacity is strong, and it is not easy to deform. MODERN ELEGANCE:Simple in shape and beautiful in appearance, these door hinges are