This set of brackets that secure the LIGH183 to the Front Runner Roof Rack. The mounting brackets secure this light bar on the front of your Rack by using the top T-slots of the front combined slat profile or side placement by using the T-slots of the side profile. All components are made of Steel and sealed with the same durable, weather-resistant black powder coating as the Front Runner Roof Racks. Includes all installation hardware and fitting instructions.