STURDY AND DURABLE: Made of heavy-duty stainless steel with maximum corrosion resistance and durability, the hidden door center pivot hinges are designed to provide reliable support for years to come CONVENIENT AND INVISIBLE: With a unique roller ball design, these 360 degree pivot door hinges provide a simple and effective way to swing the door easily and quietly. The solid rotation door hinge with a sturdy design and smooth bearings is almost hidden EASY INSTALLATION: The elegant design with up and down linkage function allows for quick and easy installation. The rotating hidden door pivot hinge can be mounted at the top level of the door and is fixed to a hole on the door surface. , closet doors, hinged windows and much more. Perfect replacement door hinges for your old or damaged ones BUY WITH CONFIDENCE: With compact design and solid construction, these rotating door pivot hinges are a nice accessory for your door hardware. Specifications: Material: Stainless Steel Color: Silver