Hidden design – Our hidden door hinges are specially designed to remain concealed when the door is closed, providing a clean and seamless appearance. Suitable for both left-handed and right-handed doors, these heavy-duty hinges require slotting for installation. The non-standard size is ideal for DIY hidden door projects. High-quality construction – Made from stainless steel for durability and long-lasting performance. Advanced technology, reliability, and safety – The concealed hinge is manufactured using an integrated laser welding process, offering enhanced durability, load-bearing capacity, and wear resistance. Built-in gaskets and sealed bearings allow the door to open and close quietly. Before installation, hinge leaves may move freely, potentially causing noise. Once installed, the door and frame provide proper support and alignment, ensuring smooth and silent operation. Easy to install – The hidden hinge comes with stainless steel screws. High-density self-tapping screws work seamlessly with the hinge, ensuring a secure fit that resists loosening and deformation. Widely used – Stainless steel with a wire-drawn finish. Suitable for wooden doors, swing doors, secret doors, aluminum doors, fire doors, smoke doors, soundproof doors, and security doors. Color: Black Material: Stainless steel Package Contents: 1 x Hinge Note: The package includes only the items listed above. Other products are not included. Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by ±1–3 cm.