This is a set of flex plate / crankshaft bolts for 1956 - 1960 Cadillacs. These will fit all models of those year Cadillac's. This are good used original bolts, the threads are all good, there is nothing wrong with these, they just need a good clean up and they will be ready to go again. These hold the flex plate onto the crankshaft. Sold As Is, As Shown. Please let me know if you would like any other pictures of info. Thanks