These hold the rear leaf spring into the cross member of the frame. Made to the original Ford blueprint sizes so they are the correct length and don't need to be cut down like the imports. 2-3/4" ID, 4" long from under the head to the tip of the threads, 3-7/8" from under head to cross drilled hole for cotter pin. Originals were a forging that was flattened on the top and partially down the sides, these are made out of round stock but will function the same. U.S.A.