Set of flex plate / crankshaft bolts from a 1963 Cadillac. These will fit all models of 1963 Cadillac's, and may fit 1961 & 1962 Cadillac's as well but I am not sure so please make sure they are correct for your application before buying. 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 us know if you would like any other pictures of info. Thanks