STURDY AND DURABLE: Made of heavy-duty stainless steel with maximum corrosion resistance and durability, the concealed 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 swivel door pivot hinges provide a simple and effective way to swing the door easily and quietly. Strong swing door hinge with sturdy design and smooth bearings is almost hidden EASY INSTALLATION: Sleek design with up and down linking function makes installation quick and easy. The rotating concealed door pivot hinge can be mounted at the top level of the door and is fixed to a hole on the surface of the door. , closet doors, folding windows and much more. Perfect replacement door hinges for your old or damaged one BUY WITH CONFIDENCE: With a compact design and solid construction, these rotary door pivot hinges are a beautiful accessory for your door hardware. Specifications: Material: Stainless Steel Color: Silver Dimensions: 75 x 17 x 20 mm / 2.95 x 0.67 x 0.79 in (L x W x Max.H) Mounting Hole Diameter: 5mm / 0.2 inch Stem Diameter: 14mm / 0.55 inch Thickness: 2.8 mm / 0.11 inch