7 inch Hidden Door Hinges, Zinc Alloy Concealed Hinges,180 Degree Swing, 3 Way Adjustable Butt 7 x 2.7 x 1inch, Black Door Hinges for Bookcase Door and Invisible Door (2 Pack mounting Hardware)

Hidden Design: Hidden Door Hinge offers a completely invisible integrated solution that blends the door into the wall, creating a seamless, stylish hidden door that enhances the aesthetics of a sophisticated space. | Easy installation: Concealed hinges are adjustable, making installation easy and convenient. The hinges are adjustable in three dimensions: 2.5mm vertically, 2.5mm horizontally, and 1.0mm in depth. The hinges can be adjusted without disassembling the door. | SILENT & STRONG LOAD - Built-in spacers reduce friction, enabling quiet door opening and closing to avoid disturbing. Each pair of invisible door hinges supports up to 88 pounds and offers a 180-degree opening angle, balancing functionality with user comfort | Wide compatibility: Hidden hinges are suitable for both left- and right-opening doors, and are compatible with wooden, metal, and commercial doors (door thickness > 35 mm, door width < 1000 mm). They are ideal for creating hidden doors, bookshelf doors, folding doors, French doors, feature walls, and various DIY projects. | LIFETIME GUARANTEE- If you are not satisfied, we'll give you refund within 90 days of purchase.