Garage door replacement hinge, used on overhead sectional doors. Verify the identifying number(s) of the hinge(s) you are replacing: No. 1 hinges are installed down the center of the door to connect all panels together, and on the outer edges of the door to attach the first (bottom) and second panels. No. 2 hinges are installed on the outer edge of the door, connecting panels two and three. No. 3 hinges connect panels three and four. Packaging includes carriage bolts, nuts, and complete instructions.