【Material】: This hidden hinge for doors is made of zinc alloy material, which has great durability and strength, strong load bearing capacity, and long service life 【Adjustable design】: The invisible door hinge adopts an adjustable design, which allows you to fine tune according to actual conditions, making the door opening and closing smoother 【Invisible design】: The hardware accessory adopts a unique design to hide the hinge inside the door without affecting the overall beauty of the door. The size is compact, which is suitable for modern minimalist designs focusing on space efficiency 【Easy installation】: The Secrets Doors hidden hinge has high reliability and performance, simple and convenient installation, saving time and effort, and no complicated tools are required 【Widely applicable】: Concealed door hinge is suitable for various wooden doors, hidden doors, etc., meeting the needs of different users, practical and beautiful Specification: Material: Zinc alloy Applicable Door width: 100 cm, thickness: 4 cm Applicable to folding doors, invisible doors, wooden doors Size Chart:16.5 cmx7.3 cm/6.50 inchx2.87 inch (Black) Package Includes: 1 Door Hinge Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.