installation. The top and bottom ends of the door, the thickness, must be perfectly perpendicular against the top and bottom parts of the door jambs, respectively. The above are also applicable to windows and the corresponding window jambs. In the future we can use a custom made Google Door Jambs, and Google Doors, Google Emergency Exit Doors, Google Windows, Google Emergency Exit Windows, Google Gates, Google Emergency Exit Gates (and all others), Google Cabinets, Google Dish Holders, and Google Refrigerators which doors would no longer need any magnets for closure (Read Here, Important) (Read Here, Important). The inclinations of all of the above are best achieved using a custom made Google Hinges. I hope this Google article is helpful to you.