ABH 1000 Series Concealed Mount, Heavy Duty Overhead Holder - FrictionThe ABH 1000 Series with Friction Function Most commonly used on doors without closers. Door will stay held open at the selected degree of opening. Friction tension adjustment screw controls the amount of resistance when opening and closing the door. Overhead holders and stops are used to prevent unnecessary damage to the door, frame, wall and other door hardware by limiting the degree of door swing. They are installed at the top of a door opening;