General description Made of heavy-duty stainless steel, these 4-inch ball bearing door hinges are precision crafted for high strength and durability. The anti-rust treated surface ensures excellent anti-corrosion properties, making them suitable for both interior and exterior doors. With their smooth operation, these hinges produce no noise when opening or closing the door, thanks to the lubricated ball bearing mechanism. Technical specifications Size: 4 inches (100mm) Material: Heavy-duty stainless steel Mounting holes: 8 Applications Standard interior residential doors Cabinets Doors Windows Wardrobes Toolboxes