This handy flag allows drivers to yield to the Funeral Procession, helping to prevent accidents. With the advent of daytime running lights on new vehicles, it's difficult to identify which vehicles are in a Funeral Procession, as well as when it is raining when everyone has their headlights on. It also helps drivers in the Funeral Procession to follow one another if they get separated. The clip at the base of the flagpole slips onto the open window. Once the window is closed, the durable flagpole will not come off in high winds or fast speeds. It will also attach to any make or model of vehicle, not just metallic ones. Will not mar or scratch the vehicle in any way.