Sturdy and Durable: Made of heavy-duty stainless steel with maximum corrosion resistance and durability, the concealed hinges are made to provide reliable support for years to come Convenient and Invisible: With a unique ball design, these 360 degree pivot door hinges provide a simple and effective way to swing the door easily and quietly. Solid rotation door hinge with a sturdy design and nearly invisible smooth bearings Easy Installation: The top pivot comes with a retractable pin for quick and easy installation. The concealed pivot door hinge can be mounted at the top of the door and is fixed to a hole on the door surface Widely Uses: The concealed rotating door hinges work great for swinging doors, gates and more. Great pivot adjustment option when the weight of the door is a concern over traditional door frame hinges Buy with Confidence: With a compact design and solid construction, these rotating door hinges are a nice addition to your door hardware.