You are Buying a brand new Rebel Performance Products OPKIT2 Stainless Steel Oil Pan Stud and Nut Kit.  These studs are made of stainless steel, Kit contains 20 of a  5/16"-18 X 1.25" studs, and 2 of a 1/4"-20 X 1.25" studs  , and include 6 point stainless steel serrated flange nuts. Plus we include two allen wrench to install them.  These will fit any Big Block Chevy V8's .   You will have to do a little math on your end to make sure that 1.25" are correct for your Oil Pan ( depends on thickness of gasket and Oil Pan flange.  Can be used with steel or aluminum Oil Pans.  I do offer them in 1.50" also.  This is a great upgrade when replace your Oil Pan, or even when you are replacing your gasket.  Fast and Free shipping to USA addresses.  Check out our other listing for other stainless steel stud kits and bolt kits.  We offer Valve Cover stud kits, timing cover stud kits, plus working on more. Free Local Pick Up in our Wellington Ohio Location