Designed for quiet, carefree operation of lightweight louver or cafe doors 3/4 in to 1-3/8 in thickness. Hinge has adjustment feature to align doors. Returns door to center of opening automatically by gravity. Holds door open at 90° on either side of opening. Door weight carried on tough, silent nylon bearings. For one door. Includes 1 - #8 slotted external tooth washer, 2 - 8 x 3/4, 10 x 3/4 pan head wood screws and 4 - 10 x 3/4 flat head wood screws.