Sturdy and Durable: The hidden door center pivot hinges are made of heavy-duty stainless steel with maximum corrosion resistance and durability and are designed to provide reliable support for years to come. Convenient and Invisible: Featuring a unique roller ball design, 360 degree rotating door hinges provide a simple and effective way to easily and quietly pivot the door. The solid pivot door hinge with sturdy design and smooth-running bearings is almost hidden. Easy Installation: The sleek design with up and down linkage feature allows for quick and easy installation. The pivot concealed door pivot hinge can be mounted on the upper level of the door and attaches to a hole in the door surface. Wide Applications: The concealed pivot door hinges work wonderfully for swing doors, kitchen cabinets, kitchen and cupboard doors, display windows and more. Perfect replacement for your old or damaged door hinges. Buy with confidence: With their compact design and solid construction, these