Have you always your personal private Passage ? . or concealed Door like that bat cave ? . This uncomparable proprietary hinge system is 100 made in the USA, and allows you to design and build your personal concealed door. It the ability to be put-upon for an inswing or out swing door system. It a 100 % concealed doorway system. to build and install offers a lifetime warranty. and build Instructions NOT Included ! . Murphy Door Hinge system is for the who can design and build a cabinet door. NO or instructions included or on tap ! . This is 100 % .