Rock Tamers GMC trim plates are an officially licensed add-on mudflap accessory item, allowing customization to your mudflap to show off your GMC pride. Includes 2 stainless steel trim plates with straight forward installation instructions. Rock Tamers mudflaps sold separately. ROCK TAMERS are the premiere “Adjustable and Removable” Mudflap System designed to provide the ultimate protection for your towables from damage caused by rocks and road debris and the perfect solution for consumers who want the utility aspect of mudflaps and to maintain their vehicle's stylish and attractive appearance.