Includes chrome-plated stainless steel hardware. Derby Cover - Jeweled Skull. The sinister smokey chrome finish is the ideal complement to a blacked-out ride, and the contrasting 3-D chain rims the surface and surrounds the distinctive Willie G Skull with black-filled eyes. Select from the traditional skull design, or for a little added zing, choose the version with the edgy jewel-encrusted jaw line. Either way, this complete collection is a tribute to the mechanical side of your ride.