The Ultima, aptly named, is our top of the line button and comes complete with the billet aluminum outer bezel, horn center, electrical switch and German low head socket screws. The screws are fully functional, bolting directly to the hub, positively holding the button assembly to the wheel, not simply by friction, as with most other horn buttons. Both the outer bezel and center are available in satin, polished or an oven fired black enamel, which is virtually scratchproof.