Hinge #2, standard 18 gauge, plain steel. Used between sections 2 and 3 on the door. The #2 has a little more offset than a #1 because this is where the door starts moving into the curve of the track. 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.