This is a set of flex plate / crankshaft bolts for 1955 Cadillac. These will fit all models of 1955 Cadillac's and may fit other years as well, but I'm not sure so please make sure they are correct for your application before purchasing them. 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.