Hinge #1, standard 18 gauge, plain steel. Used between sections 1 and 2 on the door. The #1 has the smallest offset of the numbered hinges because the bottom of the door stays closer to vertical during operation. If your old hinge is bent, cracked, or the holes are worn out, replace it and match the number stamped on the original hinge before ordering. The 18 gauge steel is a standard residential option for everyday garage door use.