This pivot hinge can be used on heavy, wide doors without worrying about warping or warping Unlike traditional hinges that were installed on the side of the door, this pivot hinge mounts above and below the door for added strength and stability Whether you need a bookshelf door, bookcase door, or a hidden room, this pivot hinge is ready for you To ensure that each of our pivot hinge is rigorously tested before leaving the factory. Contact us if you have any questions about our pivot hinges Pivot hinges are made of rust-resistant stainless steel to hold heavy wide doors easily and steadily, Manufacturer: Rxgiasup