General description Sturdy and durable, the CCYKXA 2Pcs 360 Degree Rotation Hidden Pivot Door Hinges are made of heavy-duty stainless steel, ensuring maximum corrosion resistance and longevity. These hidden hinges are designed to provide reliable support for years to come, featuring a unique ball design that allows for easy and quiet door swinging. Technical specifications Dimensions: 128 x 23 mm Installation Easy installation with a retractable spindle for quick setup. Can be mounted at the top level of the door, fixed to a hole on the door surface. Usage Ideal for swinging doors, gates, and more. Offers great pivot adjustment options for heavy doors that strain traditional door frame hinges.