M4 M5 M6 Rivet Nut Selection Pack (80 pcs) + Drills LED Both of these Thule cross Both of these Thule cross bars have the same bar profile just the mounting system to the vehicle is different b) DRL LAMP this is produced by the ring of LEDs around the outer edge of the lamp unit this is connected using the wiring loom connected to an ignition live feed These rivet nuts have a large flange head this means that the rivet nut is less likely to fall into the drilled hole this can happen if your not careful with the smaller head versions the large head also helps to spread the load These items allow you to create a threaded hole in sheet metal or plastic