General description The Stainless Steel Invisible Buckle Cross Door Hinge is designed for a seamless and aesthetic installation in various door types. Made from durable zinc alloy and high-quality 304 stainless steel, these hidden hinges provide a clean look while ensuring strong support. They are suitable for wooden doors and aluminum frame doors, including bifold doors, with a bearing strength of 7kg, 10kg, or 20kg. Technical specifications Material: Zinc Alloy + Stainless Steel Color: Silver Bearing Strength: 7kg, 10kg, 20kg Opening Angle: 180 degrees Door Gap: Less than 1mm when closed Installation Determine the number of hinges needed and mark the appropriate locations on the door. Insert the hinge seat into the hole of the door plate and secure it with screws. Lift the door leaf and insert the hinge side into the corresponding hole, fixing it with screws. Adjust the hinge position to ensure smooth operation and uniform gap. Tighten all screws to secure the installation. Usage