The Pro Series Door Installation Hardware Tool Kit, allows you to secure the door vertically, freeing your hands to work. What makes this tool special is that it fits many types of doors - regular swing doors, sliding doors, and even barn doors. Whether your doors are 1-3/8 inches thick or 1-3/4 inches thick, this helper can handle it, and it can hold doors weighing up to 300 pounds. You can adjust the height and level the door in three directions, which really simplifies the installation process and saves tons of time. By using this kit, you reduce the risk of damaging your walls or the door itself, and you yourself are less likely to get hurt trying to hold a heavy door.