Photograph of Type F universal hook block at the National Supply Company, 1953. At center, a large crane hook can be seen. The head of the hook is lightly-colored and curved with a small latch on the side. The remaining body of the hook is darkly-colored, and it is composed of a small cylindrical arm with the letters "NSCO" etched upon it and a large body with the word "IDEAL" at its top. Various bolts and other attachments can be seen on the device. To the right of the hook block, a man wearing a shirt, tie, and slacks can be seen staring up at the device. Two cables extend above the hook block, and they are connected to another crane arm. To the left of the crane arm, the operator of the crane can be seen seated within a small cubicle. A small light and ladder are seen adjacent to his panel. To the right of the crane, a long building lined with rectangular windows can be seen. In the extreme background, several automobiles can be seen near various pieces of equipment. To the left, a large crane arm can be seen near a truck. At center, a large building with a sloped roof is visible.