You are buying a Brand New Rebel Performance Stainless Steel Allen Head  Bolt Kit for GM & Chevy 10 Bolt Rear Covers with a Steel Cover. These bolts are 5/16" X 3/4"  . Please check your cover and application to make sure 3/4" will work before you order . Great way to add extra bling and protection to that build. Fast and Free shipping to USA addresses. If you have any questions on fitment, please ask before you buy.