Description: 【Sturdy】: Hidden Door Hinge is made of metal to ensure durability and reliability. When using two hinges, it can support doors weighing up to 80 kg, making it an ideal choice for heavy duty applications 【Installation Kit】: Each set of hinges includes a complete installation kit, which contains a concealed hinge, two sizes of decorative covers, and stainless steel screws (*16 and *8) for secure fixing to aluminum alloy doors. For wooden doors, suitable wood screws are required 【Multiple Door Compatibility】: Invisible Hinge is suitable for doors with a thickness of 30-60 mm, a maximum width of 900 mm, and a maximum height of 2100 mm. The hinge provides an adjustment range of ±2mm in both vertical and horizontal directions, allowing precise alignment for optimal door function 【Installation Guide】: Invisible Concealed Hinge comes with a detailed installation manual that guides you step by step through the installation process, ensuring easy and correct installation and adjustment of the door position 【Maintenance Tips】: Regularly check all screws every six months to ensure they are tightened. Avoid using this product in places directly exposed to rain or snow. If the hinges show signs of sagging or misalignment, do not slam the door shut to prevent damage or injury Size Chart: Height: 13cm/5.12inch Package Includes: 1 Hidden Door Hinge Note: Please allow slightly errors due to manual measurement and different monitors.