This particular Pro Panel utilizes an ATO 4 fuse circuit system, but also has a grounding strip on it as well. Again, can be used for an ignition accessory panel for lighting, accessory gauges, or auxilary outlets. Use the grounding strip to ground any lighting, gauges etc. Flush mount. Uses ATO/ATF flat fuses. Can be plugged into stock OEM fuse boxes on Cars, Trucks, or Tractors.