(MCC204)  CHROME TRIANGULAR SPREADERS     Specifications for (MCC204)  Material : Chrome steel , triple plated Copper / Nickel / Chrome Thickness:  The average thickness of the steel used  .085 thousands steel. Length : 1 1/2 inches Hole size : 1/4 inch Application :  Ford Chevy Mopar Oldsmobile engines ( these are the best choice for most engines Installation : These spreaders sit on top of the valve cover between the valve cover bolt and valve cover they function as a washer that spreads the bolt pressure out to help aid in gasket sealing of your valve covers