Kits include a pair of custom laser cut mild steel plates, rubber isolation grommets and brass or aluminum decorative top hat washers as well as 5/16"-18, chrome-plated, flat head allen bolts which sit flush. The steel plates get welded to the backbone of any custom motorcycle frame and the bolts pass through the decorative inserts before being threaded into bungs on the bottom of a custom fuel tank. Simple, secure and extremely customizable for today's garage builder. All components in this kit are proudly made in the USA.