Pennsylvania: House construction. Man walks into house with large piece of wood. Installing screws for a door. An easy hinge to put together. CU hinges. EXT metal working plant. Machine making hinge pieces with uniform high quality and shininess! Drilling machine. Interlocking fingers on the hinge. Machine created barrels on hinge. Old women inspect. She might not have her dentures in. Younger women insert pins into the hinge on the conveyor belt.